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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 "common.h"
39 #include "internal.h"
40 #include "log.h"
41 
42 #define LINE_SZ 1024
43 
44 static int av_log_level = AV_LOG_INFO;
45 static int flags;
46 
47 #if HAVE_SETCONSOLETEXTATTRIBUTE
48 #include <windows.h>
49 static const uint8_t color[16 + AV_CLASS_CATEGORY_NB] = {
50  [AV_LOG_PANIC /8] = 12,
51  [AV_LOG_FATAL /8] = 12,
52  [AV_LOG_ERROR /8] = 12,
53  [AV_LOG_WARNING/8] = 14,
54  [AV_LOG_INFO /8] = 7,
55  [AV_LOG_VERBOSE/8] = 10,
56  [AV_LOG_DEBUG /8] = 10,
57  [16+AV_CLASS_CATEGORY_NA ] = 7,
58  [16+AV_CLASS_CATEGORY_INPUT ] = 13,
59  [16+AV_CLASS_CATEGORY_OUTPUT ] = 5,
60  [16+AV_CLASS_CATEGORY_MUXER ] = 13,
61  [16+AV_CLASS_CATEGORY_DEMUXER ] = 5,
62  [16+AV_CLASS_CATEGORY_ENCODER ] = 11,
63  [16+AV_CLASS_CATEGORY_DECODER ] = 3,
64  [16+AV_CLASS_CATEGORY_FILTER ] = 10,
65  [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 9,
66  [16+AV_CLASS_CATEGORY_SWSCALER ] = 7,
67  [16+AV_CLASS_CATEGORY_SWRESAMPLER ] = 7,
68 };
69 
70 static int16_t background, attr_orig;
71 static HANDLE con;
72 #define set_color(x) SetConsoleTextAttribute(con, background | color[x])
73 #define set_256color set_color
74 #define reset_color() SetConsoleTextAttribute(con, attr_orig)
75 #else
76 
77 static const uint32_t color[16 + AV_CLASS_CATEGORY_NB] = {
78  [AV_LOG_PANIC /8] = 52 << 16 | 196 << 8 | 0x41,
79  [AV_LOG_FATAL /8] = 208 << 8 | 0x41,
80  [AV_LOG_ERROR /8] = 196 << 8 | 0x11,
81  [AV_LOG_WARNING/8] = 226 << 8 | 0x03,
82  [AV_LOG_INFO /8] = 253 << 8 | 0x09,
83  [AV_LOG_VERBOSE/8] = 40 << 8 | 0x02,
84  [AV_LOG_DEBUG /8] = 34 << 8 | 0x02,
85  [16+AV_CLASS_CATEGORY_NA ] = 250 << 8 | 0x09,
86  [16+AV_CLASS_CATEGORY_INPUT ] = 219 << 8 | 0x15,
87  [16+AV_CLASS_CATEGORY_OUTPUT ] = 201 << 8 | 0x05,
88  [16+AV_CLASS_CATEGORY_MUXER ] = 213 << 8 | 0x15,
89  [16+AV_CLASS_CATEGORY_DEMUXER ] = 207 << 8 | 0x05,
90  [16+AV_CLASS_CATEGORY_ENCODER ] = 51 << 8 | 0x16,
91  [16+AV_CLASS_CATEGORY_DECODER ] = 39 << 8 | 0x06,
92  [16+AV_CLASS_CATEGORY_FILTER ] = 155 << 8 | 0x12,
93  [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 192 << 8 | 0x14,
94  [16+AV_CLASS_CATEGORY_SWSCALER ] = 153 << 8 | 0x14,
95  [16+AV_CLASS_CATEGORY_SWRESAMPLER ] = 147 << 8 | 0x14,
96 };
97 
98 #define set_color(x) fprintf(stderr, "\033[%d;3%dm", (color[x] >> 4) & 15, color[x] & 15)
99 #define set_256color(x) fprintf(stderr, "\033[48;5;%dm\033[38;5;%dm", (color[x] >> 16) & 0xff, (color[x] >> 8) & 0xff)
100 #define reset_color() fprintf(stderr, "\033[0m")
101 #endif
102 static int use_color = -1;
103 
104 static void colored_fputs(int level, const char *str)
105 {
106  if (use_color < 0) {
107 #if HAVE_SETCONSOLETEXTATTRIBUTE
108  CONSOLE_SCREEN_BUFFER_INFO con_info;
109  con = GetStdHandle(STD_ERROR_HANDLE);
110  use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") &&
111  !getenv("AV_LOG_FORCE_NOCOLOR");
112  if (use_color) {
113  GetConsoleScreenBufferInfo(con, &con_info);
114  attr_orig = con_info.wAttributes;
115  background = attr_orig & 0xF0;
116  }
117 #elif HAVE_ISATTY
118  use_color = !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR") &&
119  (getenv("TERM") && isatty(2) ||
120  getenv("AV_LOG_FORCE_COLOR"));
121  if (getenv("AV_LOG_FORCE_256COLOR"))
122  use_color *= 256;
123 #else
124  use_color = getenv("AV_LOG_FORCE_COLOR") && !getenv("NO_COLOR") &&
125  !getenv("AV_LOG_FORCE_NOCOLOR");
126 #endif
127  }
128 
129  if (use_color == 1) {
130  set_color(level);
131  } else if (use_color == 256)
132  set_256color(level);
133  fputs(str, stderr);
134  if (use_color) {
135  reset_color();
136  }
137 }
138 
139 const char *av_default_item_name(void *ptr)
140 {
141  return (*(AVClass **) ptr)->class_name;
142 }
143 
144 AVClassCategory av_default_get_category(void *ptr)
145 {
146  return (*(AVClass **) ptr)->category;
147 }
148 
149 static void sanitize(uint8_t *line){
150  while(*line){
151  if(*line < 0x08 || (*line > 0x0D && *line < 0x20))
152  *line='?';
153  line++;
154  }
155 }
156 
157 static int get_category(void *ptr){
158  AVClass *avc = *(AVClass **) ptr;
159  if( !avc
160  || (avc->version&0xFF)<100
161  || avc->version < (51 << 16 | 59 << 8)
162  || avc->category >= AV_CLASS_CATEGORY_NB) return AV_CLASS_CATEGORY_NA + 16;
163 
164  if(avc->get_category)
165  return avc->get_category(ptr) + 16;
166 
167  return avc->category + 16;
168 }
169 
170 static void format_line(void *ptr, int level, const char *fmt, va_list vl,
171  char part[3][LINE_SZ], int part_size, int *print_prefix, int type[2])
172 {
173  AVClass* avc = ptr ? *(AVClass **) ptr : NULL;
174  part[0][0] = part[1][0] = part[2][0] = 0;
175  if(type) type[0] = type[1] = AV_CLASS_CATEGORY_NA + 16;
176  if (*print_prefix && avc) {
177  if (avc->parent_log_context_offset) {
178  AVClass** parent = *(AVClass ***) (((uint8_t *) ptr) +
179  avc->parent_log_context_offset);
180  if (parent && *parent) {
181  snprintf(part[0], part_size, "[%s @ %p] ",
182  (*parent)->item_name(parent), parent);
183  if(type) type[0] = get_category(parent);
184  }
185  }
186  snprintf(part[1], part_size, "[%s @ %p] ",
187  avc->item_name(ptr), ptr);
188  if(type) type[1] = get_category(ptr);
189  }
190 
191  vsnprintf(part[2], part_size, fmt, vl);
192 
193  if(*part[0] || *part[1] || *part[2])
194  *print_prefix = strlen(part[2]) && part[2][strlen(part[2]) - 1] == '\n';
195 }
196 
197 void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
198  char *line, int line_size, int *print_prefix)
199 {
200  char part[3][LINE_SZ];
201  format_line(ptr, level, fmt, vl, part, sizeof(part[0]), print_prefix, NULL);
202  snprintf(line, line_size, "%s%s%s", part[0], part[1], part[2]);
203 }
204 
205 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
206 {
207  static int print_prefix = 1;
208  static int count;
209  static char prev[LINE_SZ];
210  char part[3][LINE_SZ];
211  char line[LINE_SZ];
212  static int is_atty;
213  int type[2];
214 
215  if (level > av_log_level)
216  return;
217  format_line(ptr, level, fmt, vl, part, sizeof(part[0]), &print_prefix, type);
218  snprintf(line, sizeof(line), "%s%s%s", part[0], part[1], part[2]);
219 
220 #if HAVE_ISATTY
221  if (!is_atty)
222  is_atty = isatty(2) ? 1 : -1;
223 #endif
224 
225  if (print_prefix && (flags & AV_LOG_SKIP_REPEATED) && !strcmp(line, prev) && *line){
226  count++;
227  if (is_atty == 1)
228  fprintf(stderr, " Last message repeated %d times\r", count);
229  return;
230  }
231  if (count > 0) {
232  fprintf(stderr, " Last message repeated %d times\n", count);
233  count = 0;
234  }
235  strcpy(prev, line);
236  sanitize(part[0]);
237  colored_fputs(type[0], part[0]);
238  sanitize(part[1]);
239  colored_fputs(type[1], part[1]);
240  sanitize(part[2]);
241  colored_fputs(av_clip(level >> 3, 0, 6), part[2]);
242 }
243 
244 static void (*av_log_callback)(void*, int, const char*, va_list) =
245  av_log_default_callback;
246 
247 void av_log(void* avcl, int level, const char *fmt, ...)
248 {
249  AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
250  va_list vl;
251  va_start(vl, fmt);
252  if (avc && avc->version >= (50 << 16 | 15 << 8 | 2) &&
253  avc->log_level_offset_offset && level >= AV_LOG_FATAL)
254  level += *(int *) (((uint8_t *) avcl) + avc->log_level_offset_offset);
255  av_vlog(avcl, level, fmt, vl);
256  va_end(vl);
257 }
258 
259 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
260 {
261  if(av_log_callback)
262  av_log_callback(avcl, level, fmt, vl);
263 }
264 
265 int av_log_get_level(void)
266 {
267  return av_log_level;
268 }
269 
270 void av_log_set_level(int level)
271 {
272  av_log_level = level;
273 }
274 
275 void av_log_set_flags(int arg)
276 {
277  flags = arg;
278 }
279 
280 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
281 {
282  av_log_callback = callback;
283 }
284 
285 static void missing_feature_sample(int sample, void *avc, const char *msg,
286  va_list argument_list)
287 {
288  av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
289  av_log(avc, AV_LOG_WARNING, " is not implemented. Update your FFmpeg "
290  "version to the newest one from Git. If the problem still "
291  "occurs, it means that your file has a feature which has not "
292  "been implemented.\n");
293  if (sample)
294  av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
295  "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
296  "and contact the ffmpeg-devel mailing list.\n");
297 }
298 
299 void avpriv_request_sample(void *avc, const char *msg, ...)
300 {
301  va_list argument_list;
302 
303  va_start(argument_list, msg);
304  missing_feature_sample(1, avc, msg, argument_list);
305  va_end(argument_list);
306 }
307 
308 void avpriv_report_missing_feature(void *avc, const char *msg, ...)
309 {
310  va_list argument_list;
311 
312  va_start(argument_list, msg);
313  missing_feature_sample(0, avc, msg, argument_list);
314  va_end(argument_list);
315 }
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