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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 <stdlib.h>
36 #include "avutil.h"
37 #include "common.h"
38 #include "log.h"
39 
40 #define LINE_SZ 1024
41 
42 static int av_log_level = AV_LOG_INFO;
43 static int flags;
44 
45 #if HAVE_SETCONSOLETEXTATTRIBUTE
46 #include <windows.h>
47 static const uint8_t color[16 + AV_CLASS_CATEGORY_NB] = {
48  [AV_LOG_PANIC /8] = 12,
49  [AV_LOG_FATAL /8] = 12,
50  [AV_LOG_ERROR /8] = 12,
51  [AV_LOG_WARNING/8] = 14,
52  [AV_LOG_INFO /8] = 7,
53  [AV_LOG_VERBOSE/8] = 10,
54  [AV_LOG_DEBUG /8] = 10,
55  [16+AV_CLASS_CATEGORY_NA ] = 7,
56  [16+AV_CLASS_CATEGORY_INPUT ] = 13,
57  [16+AV_CLASS_CATEGORY_OUTPUT ] = 5,
58  [16+AV_CLASS_CATEGORY_MUXER ] = 13,
59  [16+AV_CLASS_CATEGORY_DEMUXER ] = 5,
60  [16+AV_CLASS_CATEGORY_ENCODER ] = 11,
61  [16+AV_CLASS_CATEGORY_DECODER ] = 3,
62  [16+AV_CLASS_CATEGORY_FILTER ] = 10,
63  [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 9,
64  [16+AV_CLASS_CATEGORY_SWSCALER ] = 7,
65  [16+AV_CLASS_CATEGORY_SWRESAMPLER ] = 7,
66 };
67 
68 static int16_t background, attr_orig;
69 static HANDLE con;
70 #define set_color(x) SetConsoleTextAttribute(con, background | color[x])
71 #define set_256color set_color
72 #define reset_color() SetConsoleTextAttribute(con, attr_orig)
73 #else
74 
75 static const uint32_t color[16 + AV_CLASS_CATEGORY_NB] = {
76  [AV_LOG_PANIC /8] = 52 << 16 | 196 << 8 | 0x41,
77  [AV_LOG_FATAL /8] = 208 << 8 | 0x41,
78  [AV_LOG_ERROR /8] = 196 << 8 | 0x11,
79  [AV_LOG_WARNING/8] = 226 << 8 | 0x03,
80  [AV_LOG_INFO /8] = 253 << 8 | 0x09,
81  [AV_LOG_VERBOSE/8] = 40 << 8 | 0x02,
82  [AV_LOG_DEBUG /8] = 34 << 8 | 0x02,
83  [16+AV_CLASS_CATEGORY_NA ] = 250 << 8 | 0x09,
84  [16+AV_CLASS_CATEGORY_INPUT ] = 219 << 8 | 0x15,
85  [16+AV_CLASS_CATEGORY_OUTPUT ] = 201 << 8 | 0x05,
86  [16+AV_CLASS_CATEGORY_MUXER ] = 213 << 8 | 0x15,
87  [16+AV_CLASS_CATEGORY_DEMUXER ] = 207 << 8 | 0x05,
88  [16+AV_CLASS_CATEGORY_ENCODER ] = 51 << 8 | 0x16,
89  [16+AV_CLASS_CATEGORY_DECODER ] = 39 << 8 | 0x06,
90  [16+AV_CLASS_CATEGORY_FILTER ] = 155 << 8 | 0x12,
91  [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 192 << 8 | 0x14,
92  [16+AV_CLASS_CATEGORY_SWSCALER ] = 153 << 8 | 0x14,
93  [16+AV_CLASS_CATEGORY_SWRESAMPLER ] = 147 << 8 | 0x14,
94 };
95 
96 #define set_color(x) fprintf(stderr, "\033[%d;3%dm", (color[x] >> 4) & 15, color[x] & 15)
97 #define set_256color(x) fprintf(stderr, "\033[48;5;%dm\033[38;5;%dm", (color[x] >> 16) & 0xff, (color[x] >> 8) & 0xff)
98 #define reset_color() fprintf(stderr, "\033[0m")
99 #endif
100 static int use_color = -1;
101 
102 static void colored_fputs(int level, const char *str)
103 {
104  if (use_color < 0) {
105 #if HAVE_SETCONSOLETEXTATTRIBUTE
106  CONSOLE_SCREEN_BUFFER_INFO con_info;
107  con = GetStdHandle(STD_ERROR_HANDLE);
108  use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") &&
109  !getenv("AV_LOG_FORCE_NOCOLOR");
110  if (use_color) {
111  GetConsoleScreenBufferInfo(con, &con_info);
112  attr_orig = con_info.wAttributes;
113  background = attr_orig & 0xF0;
114  }
115 #elif HAVE_ISATTY
116  use_color = !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR") &&
117  (getenv("TERM") && isatty(2) ||
118  getenv("AV_LOG_FORCE_COLOR"));
119  if (getenv("AV_LOG_FORCE_256COLOR"))
120  use_color *= 256;
121 #else
122  use_color = getenv("AV_LOG_FORCE_COLOR") && !getenv("NO_COLOR") &&
123  !getenv("AV_LOG_FORCE_NOCOLOR");
124 #endif
125  }
126 
127  if (use_color == 1) {
128  set_color(level);
129  } else if (use_color == 256)
130  set_256color(level);
131  fputs(str, stderr);
132  if (use_color) {
133  reset_color();
134  }
135 }
136 
137 const char *av_default_item_name(void *ptr)
138 {
139  return (*(AVClass **) ptr)->class_name;
140 }
141 
142 AVClassCategory av_default_get_category(void *ptr)
143 {
144  return (*(AVClass **) ptr)->category;
145 }
146 
147 static void sanitize(uint8_t *line){
148  while(*line){
149  if(*line < 0x08 || (*line > 0x0D && *line < 0x20))
150  *line='?';
151  line++;
152  }
153 }
154 
155 static int get_category(void *ptr){
156  AVClass *avc = *(AVClass **) ptr;
157  if( !avc
158  || (avc->version&0xFF)<100
159  || avc->version < (51 << 16 | 59 << 8)
160  || avc->category >= AV_CLASS_CATEGORY_NB) return AV_CLASS_CATEGORY_NA + 16;
161 
162  if(avc->get_category)
163  return avc->get_category(ptr) + 16;
164 
165  return avc->category + 16;
166 }
167 
168 static void format_line(void *ptr, int level, const char *fmt, va_list vl,
169  char part[3][LINE_SZ], int part_size, int *print_prefix, int type[2])
170 {
171  AVClass* avc = ptr ? *(AVClass **) ptr : NULL;
172  part[0][0] = part[1][0] = part[2][0] = 0;
173  if(type) type[0] = type[1] = AV_CLASS_CATEGORY_NA + 16;
174  if (*print_prefix && avc) {
175  if (avc->parent_log_context_offset) {
176  AVClass** parent = *(AVClass ***) (((uint8_t *) ptr) +
177  avc->parent_log_context_offset);
178  if (parent && *parent) {
179  snprintf(part[0], part_size, "[%s @ %p] ",
180  (*parent)->item_name(parent), parent);
181  if(type) type[0] = get_category(parent);
182  }
183  }
184  snprintf(part[1], part_size, "[%s @ %p] ",
185  avc->item_name(ptr), ptr);
186  if(type) type[1] = get_category(ptr);
187  }
188 
189  vsnprintf(part[2], part_size, fmt, vl);
190 
191  *print_prefix = strlen(part[2]) && part[2][strlen(part[2]) - 1] == '\n';
192 }
193 
194 void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
195  char *line, int line_size, int *print_prefix)
196 {
197  char part[3][LINE_SZ];
198  format_line(ptr, level, fmt, vl, part, sizeof(part[0]), print_prefix, NULL);
199  snprintf(line, line_size, "%s%s%s", part[0], part[1], part[2]);
200 }
201 
202 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
203 {
204  static int print_prefix = 1;
205  static int count;
206  static char prev[LINE_SZ];
207  char part[3][LINE_SZ];
208  char line[LINE_SZ];
209  static int is_atty;
210  int type[2];
211 
212  if (level > av_log_level)
213  return;
214  format_line(ptr, level, fmt, vl, part, sizeof(part[0]), &print_prefix, type);
215  snprintf(line, sizeof(line), "%s%s%s", part[0], part[1], part[2]);
216 
217 #if HAVE_ISATTY
218  if (!is_atty)
219  is_atty = isatty(2) ? 1 : -1;
220 #endif
221 
222  if (print_prefix && (flags & AV_LOG_SKIP_REPEATED) && !strcmp(line, prev)){
223  count++;
224  if (is_atty == 1)
225  fprintf(stderr, " Last message repeated %d times\r", count);
226  return;
227  }
228  if (count > 0) {
229  fprintf(stderr, " Last message repeated %d times\n", count);
230  count = 0;
231  }
232  strcpy(prev, line);
233  sanitize(part[0]);
234  colored_fputs(type[0], part[0]);
235  sanitize(part[1]);
236  colored_fputs(type[1], part[1]);
237  sanitize(part[2]);
238  colored_fputs(av_clip(level >> 3, 0, 6), part[2]);
239 }
240 
241 static void (*av_log_callback)(void*, int, const char*, va_list) =
242  av_log_default_callback;
243 
244 void av_log(void* avcl, int level, const char *fmt, ...)
245 {
246  AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
247  va_list vl;
248  va_start(vl, fmt);
249  if (avc && avc->version >= (50 << 16 | 15 << 8 | 2) &&
250  avc->log_level_offset_offset && level >= AV_LOG_FATAL)
251  level += *(int *) (((uint8_t *) avcl) + avc->log_level_offset_offset);
252  av_vlog(avcl, level, fmt, vl);
253  va_end(vl);
254 }
255 
256 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
257 {
258  if(av_log_callback)
259  av_log_callback(avcl, level, fmt, vl);
260 }
261 
262 int av_log_get_level(void)
263 {
264  return av_log_level;
265 }
266 
267 void av_log_set_level(int level)
268 {
269  av_log_level = level;
270 }
271 
272 void av_log_set_flags(int arg)
273 {
274  flags = arg;
275 }
276 
277 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
278 {
279  av_log_callback = callback;
280 }
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