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log.c
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1 /*
2  * log functions
3  * Copyright (c) 2003 Michel Bardiaux
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 /**
23  * @file
24  * logging functions
25  */
26 
27 #include "config.h"
28 
29 #if HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 #if HAVE_IO_H
33 #include <io.h>
34 #endif
35 #include <stdarg.h>
36 #include <stdlib.h>
37 #include "avutil.h"
38 #include "bprint.h"
39 #include "common.h"
40 #include "internal.h"
41 #include "log.h"
42 
43 #if HAVE_PTHREADS
44 #include <pthread.h>
45 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
46 #endif
47 
48 #define LINE_SZ 1024
49 
50 static int av_log_level = AV_LOG_INFO;
51 static int flags;
52 
53 #if HAVE_SETCONSOLETEXTATTRIBUTE
54 #include <windows.h>
55 static const uint8_t color[16 + AV_CLASS_CATEGORY_NB] = {
56  [AV_LOG_PANIC /8] = 12,
57  [AV_LOG_FATAL /8] = 12,
58  [AV_LOG_ERROR /8] = 12,
59  [AV_LOG_WARNING/8] = 14,
60  [AV_LOG_INFO /8] = 7,
61  [AV_LOG_VERBOSE/8] = 10,
62  [AV_LOG_DEBUG /8] = 10,
63  [16+AV_CLASS_CATEGORY_NA ] = 7,
64  [16+AV_CLASS_CATEGORY_INPUT ] = 13,
65  [16+AV_CLASS_CATEGORY_OUTPUT ] = 5,
66  [16+AV_CLASS_CATEGORY_MUXER ] = 13,
67  [16+AV_CLASS_CATEGORY_DEMUXER ] = 5,
68  [16+AV_CLASS_CATEGORY_ENCODER ] = 11,
69  [16+AV_CLASS_CATEGORY_DECODER ] = 3,
70  [16+AV_CLASS_CATEGORY_FILTER ] = 10,
71  [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 9,
72  [16+AV_CLASS_CATEGORY_SWSCALER ] = 7,
73  [16+AV_CLASS_CATEGORY_SWRESAMPLER ] = 7,
74 };
75 
76 static int16_t background, attr_orig;
77 static HANDLE con;
78 #else
79 
80 static const uint32_t color[16 + AV_CLASS_CATEGORY_NB] = {
81  [AV_LOG_PANIC /8] = 52 << 16 | 196 << 8 | 0x41,
82  [AV_LOG_FATAL /8] = 208 << 8 | 0x41,
83  [AV_LOG_ERROR /8] = 196 << 8 | 0x11,
84  [AV_LOG_WARNING/8] = 226 << 8 | 0x03,
85  [AV_LOG_INFO /8] = 253 << 8 | 0x09,
86  [AV_LOG_VERBOSE/8] = 40 << 8 | 0x02,
87  [AV_LOG_DEBUG /8] = 34 << 8 | 0x02,
88  [16+AV_CLASS_CATEGORY_NA ] = 250 << 8 | 0x09,
89  [16+AV_CLASS_CATEGORY_INPUT ] = 219 << 8 | 0x15,
90  [16+AV_CLASS_CATEGORY_OUTPUT ] = 201 << 8 | 0x05,
91  [16+AV_CLASS_CATEGORY_MUXER ] = 213 << 8 | 0x15,
92  [16+AV_CLASS_CATEGORY_DEMUXER ] = 207 << 8 | 0x05,
93  [16+AV_CLASS_CATEGORY_ENCODER ] = 51 << 8 | 0x16,
94  [16+AV_CLASS_CATEGORY_DECODER ] = 39 << 8 | 0x06,
95  [16+AV_CLASS_CATEGORY_FILTER ] = 155 << 8 | 0x12,
96  [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 192 << 8 | 0x14,
97  [16+AV_CLASS_CATEGORY_SWSCALER ] = 153 << 8 | 0x14,
98  [16+AV_CLASS_CATEGORY_SWRESAMPLER ] = 147 << 8 | 0x14,
99 };
100 
101 #endif
102 static int use_color = -1;
103 
104 static void colored_fputs(int level, const char *str)
105 {
106  if (!*str)
107  return;
108 
109  if (use_color < 0) {
110 #if HAVE_SETCONSOLETEXTATTRIBUTE
111  CONSOLE_SCREEN_BUFFER_INFO con_info;
112  con = GetStdHandle(STD_ERROR_HANDLE);
113  use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") &&
114  !getenv("AV_LOG_FORCE_NOCOLOR");
115  if (use_color) {
116  GetConsoleScreenBufferInfo(con, &con_info);
117  attr_orig = con_info.wAttributes;
118  background = attr_orig & 0xF0;
119  }
120 #elif HAVE_ISATTY
121  use_color = !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR") &&
122  (getenv("TERM") && isatty(2) ||
123  getenv("AV_LOG_FORCE_COLOR"));
124  if (getenv("AV_LOG_FORCE_256COLOR"))
125  use_color *= 256;
126 #else
127  use_color = getenv("AV_LOG_FORCE_COLOR") && !getenv("NO_COLOR") &&
128  !getenv("AV_LOG_FORCE_NOCOLOR");
129 #endif
130  }
131 
132 #if HAVE_SETCONSOLETEXTATTRIBUTE
133  if (use_color && level != AV_LOG_INFO/8)
134  SetConsoleTextAttribute(con, background | color[level]);
135  fputs(str, stderr);
136  if (use_color && level != AV_LOG_INFO/8)
137  SetConsoleTextAttribute(con, attr_orig);
138 #else
139  if (use_color == 1 && level != AV_LOG_INFO/8) {
140  fprintf(stderr,
141  "\033[%d;3%dm%s\033[0m",
142  (color[level] >> 4) & 15,
143  color[level] & 15,
144  str);
145  } else if (use_color == 256 && level != AV_LOG_INFO/8) {
146  fprintf(stderr,
147  "\033[48;5;%dm\033[38;5;%dm%s\033[0m",
148  (color[level] >> 16) & 0xff,
149  (color[level] >> 8) & 0xff,
150  str);
151  } else
152  fputs(str, stderr);
153 #endif
154 
155 }
156 
157 const char *av_default_item_name(void *ptr)
158 {
159  return (*(AVClass **) ptr)->class_name;
160 }
161 
162 AVClassCategory av_default_get_category(void *ptr)
163 {
164  return (*(AVClass **) ptr)->category;
165 }
166 
167 static void sanitize(uint8_t *line){
168  while(*line){
169  if(*line < 0x08 || (*line > 0x0D && *line < 0x20))
170  *line='?';
171  line++;
172  }
173 }
174 
175 static int get_category(void *ptr){
176  AVClass *avc = *(AVClass **) ptr;
177  if( !avc
178  || (avc->version&0xFF)<100
179  || avc->version < (51 << 16 | 59 << 8)
180  || avc->category >= AV_CLASS_CATEGORY_NB) return AV_CLASS_CATEGORY_NA + 16;
181 
182  if(avc->get_category)
183  return avc->get_category(ptr) + 16;
184 
185  return avc->category + 16;
186 }
187 
188 static void format_line(void *avcl, int level, const char *fmt, va_list vl,
189  AVBPrint part[3], int *print_prefix, int type[2])
190 {
191  AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
192  av_bprint_init(part+0, 0, 1);
193  av_bprint_init(part+1, 0, 1);
194  av_bprint_init(part+2, 0, 65536);
195 
196  if(type) type[0] = type[1] = AV_CLASS_CATEGORY_NA + 16;
197  if (*print_prefix && avc) {
198  if (avc->parent_log_context_offset) {
199  AVClass** parent = *(AVClass ***) (((uint8_t *) avcl) +
200  avc->parent_log_context_offset);
201  if (parent && *parent) {
202  av_bprintf(part+0, "[%s @ %p] ",
203  (*parent)->item_name(parent), parent);
204  if(type) type[0] = get_category(parent);
205  }
206  }
207  av_bprintf(part+1, "[%s @ %p] ",
208  avc->item_name(avcl), avcl);
209  if(type) type[1] = get_category(avcl);
210  }
211 
212  av_vbprintf(part+2, fmt, vl);
213 
214  if(*part[0].str || *part[1].str || *part[2].str) {
215  char lastc = part[2].len && part[2].len <= part[2].size ? part[2].str[part[2].len - 1] : 0;
216  *print_prefix = lastc == '\n' || lastc == '\r';
217  }
218 }
219 
220 void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
221  char *line, int line_size, int *print_prefix)
222 {
223  AVBPrint part[3];
224  format_line(ptr, level, fmt, vl, part, print_prefix, NULL);
225  snprintf(line, line_size, "%s%s%s", part[0].str, part[1].str, part[2].str);
226  av_bprint_finalize(part+2, NULL);
227 }
228 
229 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
230 {
231  static int print_prefix = 1;
232  static int count;
233  static char prev[LINE_SZ];
234  AVBPrint part[3];
235  char line[LINE_SZ];
236  static int is_atty;
237  int type[2];
238 
239  if (level > av_log_level)
240  return;
241 #if HAVE_PTHREADS
242  pthread_mutex_lock(&mutex);
243 #endif
244 
245  format_line(ptr, level, fmt, vl, part, &print_prefix, type);
246  snprintf(line, sizeof(line), "%s%s%s", part[0].str, part[1].str, part[2].str);
247 
248 #if HAVE_ISATTY
249  if (!is_atty)
250  is_atty = isatty(2) ? 1 : -1;
251 #endif
252 
253  if (print_prefix && (flags & AV_LOG_SKIP_REPEATED) && !strcmp(line, prev) &&
254  *line && line[strlen(line) - 1] != '\r'){
255  count++;
256  if (is_atty == 1)
257  fprintf(stderr, " Last message repeated %d times\r", count);
258  goto end;
259  }
260  if (count > 0) {
261  fprintf(stderr, " Last message repeated %d times\n", count);
262  count = 0;
263  }
264  strcpy(prev, line);
265  sanitize(part[0].str);
266  colored_fputs(type[0], part[0].str);
267  sanitize(part[1].str);
268  colored_fputs(type[1], part[1].str);
269  sanitize(part[2].str);
270  colored_fputs(av_clip(level >> 3, 0, 6), part[2].str);
271 end:
272  av_bprint_finalize(part+2, NULL);
273 #if HAVE_PTHREADS
274  pthread_mutex_unlock(&mutex);
275 #endif
276 }
277 
278 static void (*av_log_callback)(void*, int, const char*, va_list) =
279  av_log_default_callback;
280 
281 void av_log(void* avcl, int level, const char *fmt, ...)
282 {
283  AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
284  va_list vl;
285  va_start(vl, fmt);
286  if (avc && avc->version >= (50 << 16 | 15 << 8 | 2) &&
287  avc->log_level_offset_offset && level >= AV_LOG_FATAL)
288  level += *(int *) (((uint8_t *) avcl) + avc->log_level_offset_offset);
289  av_vlog(avcl, level, fmt, vl);
290  va_end(vl);
291 }
292 
293 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
294 {
295  void (*log_callback)(void*, int, const char*, va_list) = av_log_callback;
296  if (log_callback)
297  log_callback(avcl, level, fmt, vl);
298 }
299 
300 int av_log_get_level(void)
301 {
302  return av_log_level;
303 }
304 
305 void av_log_set_level(int level)
306 {
307  av_log_level = level;
308 }
309 
310 void av_log_set_flags(int arg)
311 {
312  flags = arg;
313 }
314 
315 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
316 {
317  av_log_callback = callback;
318 }
319 
320 static void missing_feature_sample(int sample, void *avc, const char *msg,
321  va_list argument_list)
322 {
323  av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
324  av_log(avc, AV_LOG_WARNING, " is not implemented. Update your FFmpeg "
325  "version to the newest one from Git. If the problem still "
326  "occurs, it means that your file has a feature which has not "
327  "been implemented.\n");
328  if (sample)
329  av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
330  "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
331  "and contact the ffmpeg-devel mailing list.\n");
332 }
333 
334 void avpriv_request_sample(void *avc, const char *msg, ...)
335 {
336  va_list argument_list;
337 
338  va_start(argument_list, msg);
339  missing_feature_sample(1, avc, msg, argument_list);
340  va_end(argument_list);
341 }
342 
343 void avpriv_report_missing_feature(void *avc, const char *msg, ...)
344 {
345  va_list argument_list;
346 
347  va_start(argument_list, msg);
348  missing_feature_sample(0, avc, msg, argument_list);
349  va_end(argument_list);
350 }
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