FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavutil/log.c
Date: 2026-08-25 19:43:55
Exec Total Coverage
Lines: 146 209 69.9%
Functions: 19 25 76.0%
Branches: 101 148 68.2%
Line Branch Exec Source
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 <inttypes.h>
36 #include <stdarg.h>
37 #include <stdatomic.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include "bprint.h"
42 #include "common.h"
43 #include "internal.h"
44 #include "log.h"
45 #include "thread.h"
46 #include "time.h"
47 #include "time_internal.h"
48
49 static AVMutex mutex = AV_MUTEX_INITIALIZER;
50
51 #define LINE_SZ 1024
52
53 #if HAVE_VALGRIND_VALGRIND_H && CONFIG_VALGRIND_BACKTRACE
54 #include <valgrind/valgrind.h>
55 /* this is the log level at which valgrind will output a full backtrace */
56 #define BACKTRACE_LOGLEVEL AV_LOG_ERROR
57 #endif
58
59 static atomic_int av_log_level = AV_LOG_INFO;
60 static atomic_int av_log_flags = 0;
61
62 #define NB_LEVELS 8
63 #if defined(_WIN32) && HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
64 #include <windows.h>
65 static const uint8_t win_color[16 + AV_CLASS_CATEGORY_NB] = {
66 [AV_LOG_PANIC /8] = 12,
67 [AV_LOG_FATAL /8] = 12,
68 [AV_LOG_ERROR /8] = 12,
69 [AV_LOG_WARNING/8] = 14,
70 [AV_LOG_INFO /8] = 7,
71 [AV_LOG_VERBOSE/8] = 10,
72 [AV_LOG_DEBUG /8] = 10,
73 [AV_LOG_TRACE /8] = 8,
74 [16+AV_CLASS_CATEGORY_NA ] = 7,
75 [16+AV_CLASS_CATEGORY_INPUT ] = 13,
76 [16+AV_CLASS_CATEGORY_OUTPUT ] = 5,
77 [16+AV_CLASS_CATEGORY_MUXER ] = 13,
78 [16+AV_CLASS_CATEGORY_DEMUXER ] = 5,
79 [16+AV_CLASS_CATEGORY_ENCODER ] = 11,
80 [16+AV_CLASS_CATEGORY_DECODER ] = 3,
81 [16+AV_CLASS_CATEGORY_FILTER ] = 10,
82 [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 9,
83 [16+AV_CLASS_CATEGORY_SWSCALER ] = 7,
84 [16+AV_CLASS_CATEGORY_SWRESAMPLER ] = 7,
85 [16+AV_CLASS_CATEGORY_HWDEVICE ] = 6,
86 [16+AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT ] = 13,
87 [16+AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT ] = 5,
88 [16+AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT ] = 13,
89 [16+AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT ] = 5,
90 [16+AV_CLASS_CATEGORY_DEVICE_OUTPUT ] = 13,
91 [16+AV_CLASS_CATEGORY_DEVICE_INPUT ] = 5,
92 };
93
94 static int16_t background, attr_orig;
95 static HANDLE con;
96 #endif
97
98 static const uint32_t color[16 + AV_CLASS_CATEGORY_NB] = {
99 [AV_LOG_PANIC /8] = 52 << 16 | 196 << 8 | 0x41,
100 [AV_LOG_FATAL /8] = 208 << 8 | 0x41,
101 [AV_LOG_ERROR /8] = 196 << 8 | 0x11,
102 [AV_LOG_WARNING/8] = 226 << 8 | 0x03,
103 [AV_LOG_INFO /8] = 253 << 8 | 0x09,
104 [AV_LOG_VERBOSE/8] = 40 << 8 | 0x02,
105 [AV_LOG_DEBUG /8] = 34 << 8 | 0x02,
106 [AV_LOG_TRACE /8] = 34 << 8 | 0x07,
107 [16+AV_CLASS_CATEGORY_NA ] = 250 << 8 | 0x09,
108 [16+AV_CLASS_CATEGORY_INPUT ] = 219 << 8 | 0x15,
109 [16+AV_CLASS_CATEGORY_OUTPUT ] = 201 << 8 | 0x05,
110 [16+AV_CLASS_CATEGORY_MUXER ] = 213 << 8 | 0x15,
111 [16+AV_CLASS_CATEGORY_DEMUXER ] = 207 << 8 | 0x05,
112 [16+AV_CLASS_CATEGORY_ENCODER ] = 51 << 8 | 0x16,
113 [16+AV_CLASS_CATEGORY_DECODER ] = 39 << 8 | 0x06,
114 [16+AV_CLASS_CATEGORY_FILTER ] = 155 << 8 | 0x12,
115 [16+AV_CLASS_CATEGORY_BITSTREAM_FILTER] = 192 << 8 | 0x14,
116 [16+AV_CLASS_CATEGORY_SWSCALER ] = 153 << 8 | 0x14,
117 [16+AV_CLASS_CATEGORY_SWRESAMPLER ] = 147 << 8 | 0x14,
118 [16+AV_CLASS_CATEGORY_HWDEVICE ] = 214 << 8 | 0x13,
119 [16+AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT ] = 213 << 8 | 0x15,
120 [16+AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT ] = 207 << 8 | 0x05,
121 [16+AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT ] = 213 << 8 | 0x15,
122 [16+AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT ] = 207 << 8 | 0x05,
123 [16+AV_CLASS_CATEGORY_DEVICE_OUTPUT ] = 213 << 8 | 0x15,
124 [16+AV_CLASS_CATEGORY_DEVICE_INPUT ] = 207 << 8 | 0x05,
125 };
126
127 static int use_color = -1;
128
129 #if defined(_WIN32) && HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
130 static void win_console_puts(const char *str)
131 {
132 const uint8_t *q = str;
133 uint16_t line[LINE_SZ];
134
135 while (*q) {
136 uint16_t *buf = line;
137 DWORD nb_chars = 0;
138 DWORD written;
139
140 while (*q && nb_chars < LINE_SZ - 1) {
141 uint32_t ch;
142 uint16_t tmp;
143
144 GET_UTF8(ch, *q ? *q++ : 0, ch = 0xfffd; goto continue_on_invalid;)
145 continue_on_invalid:
146 PUT_UTF16(ch, tmp, *buf++ = tmp; nb_chars++;)
147 }
148
149 WriteConsoleW(con, line, nb_chars, &written, NULL);
150 }
151 }
152 #endif
153
154 9038 static void check_color_terminal(void)
155 {
156 9038 char *term = getenv("TERM");
157
158 #if defined(_WIN32) && HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
159 CONSOLE_SCREEN_BUFFER_INFO con_info;
160 DWORD dummy;
161 con = GetStdHandle(STD_ERROR_HANDLE);
162 if (con != INVALID_HANDLE_VALUE && !GetConsoleMode(con, &dummy))
163 con = INVALID_HANDLE_VALUE;
164 if (con != INVALID_HANDLE_VALUE) {
165 GetConsoleScreenBufferInfo(con, &con_info);
166 attr_orig = con_info.wAttributes;
167 background = attr_orig & 0xF0;
168 }
169 #endif
170
171
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 9038 if (getenv("AV_LOG_FORCE_NOCOLOR")) {
172 ✗ use_color = 0;
173
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 9038 } else if (getenv("AV_LOG_FORCE_COLOR")) {
174 ✗ use_color = 1;
175 } else {
176 #if defined(_WIN32) && HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
177 use_color = (con != INVALID_HANDLE_VALUE);
178 #elif HAVE_ISATTY
179
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 9038 use_color = (term && isatty(2));
180 #else
181 use_color = 0;
182 #endif
183 }
184
185
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 9038 if (getenv("AV_LOG_FORCE_256COLOR") || term && strstr(term, "256color"))
186 9038 use_color *= 256;
187 9038 }
188
189 471638 static void ansi_fputs(int level, int tint, const char *str, int local_use_color)
190 {
191
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 471638 if (local_use_color == 1) {
192 ✗ fprintf(stderr,
193 "\033[%"PRIu32";3%"PRIu32"m%s\033[0m",
194 ✗ (color[level] >> 4) & 15,
195 ✗ color[level] & 15,
196 str);
197
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 471638 } else if (tint && use_color == 256) {
198 ✗ fprintf(stderr,
199 "\033[48;5;%"PRIu32"m\033[38;5;%dm%s\033[0m",
200 ✗ (color[level] >> 16) & 0xff,
201 tint,
202 str);
203
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 471638 } else if (local_use_color == 256) {
204 ✗ fprintf(stderr,
205 "\033[48;5;%"PRIu32"m\033[38;5;%"PRIu32"m%s\033[0m",
206 ✗ (color[level] >> 16) & 0xff,
207 ✗ (color[level] >> 8) & 0xff,
208 str);
209 } else
210 471638 fputs(str, stderr);
211 471638 }
212
213 2332535 static void colored_fputs(int level, int tint, const char *str)
214 {
215 int local_use_color;
216
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 2332535 if (!*str)
217 1860897 return;
218
219
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 471638 if (use_color < 0)
220 9038 check_color_terminal();
221
222
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 471638 if (level == AV_LOG_INFO/8) local_use_color = 0;
223 35534 else local_use_color = use_color;
224
225 #if defined(_WIN32) && HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
226 if (con != INVALID_HANDLE_VALUE) {
227 if (local_use_color)
228 SetConsoleTextAttribute(con, background | win_color[level]);
229 win_console_puts(str);
230 if (local_use_color)
231 SetConsoleTextAttribute(con, attr_orig);
232 } else {
233 ansi_fputs(level, tint, str, local_use_color);
234 }
235 #else
236 471638 ansi_fputs(level, tint, str, local_use_color);
237 #endif
238
239 }
240
241 2222 const char *av_default_item_name(void *ptr)
242 {
243 2222 return (*(AVClass **) ptr)->class_name;
244 }
245
246 ✗ AVClassCategory av_default_get_category(void *ptr)
247 {
248 ✗ return (*(AVClass **) ptr)->category;
249 }
250
251 2332535 static void sanitize(uint8_t *line){
252
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 17555916 while(*line){
253
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 15223381 if(*line < 0x08 || (*line > 0x0D && *line < 0x20))
254 14 *line='?';
255 15223381 line++;
256 }
257 2332535 }
258
259 25025 static int get_category(void *ptr){
260 25025 AVClass *avc = *(AVClass **) ptr;
261
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 25025 if( !avc
262
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 25025 || (avc->version&0xFF)<100
263
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264
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 25025 || avc->category >= AV_CLASS_CATEGORY_NB) return AV_CLASS_CATEGORY_NA + 16;
265
266
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 25025 if(avc->get_category)
267 6241 return avc->get_category(ptr) + 16;
268
269 18784 return avc->category + 16;
270 }
271
272 ✗ static const char *get_level_str(int level)
273 {
274 ✗ switch (level) {
275 ✗ case AV_LOG_QUIET:
276 ✗ return "quiet";
277 ✗ case AV_LOG_DEBUG:
278 ✗ return "debug";
279 ✗ case AV_LOG_TRACE:
280 ✗ return "trace";
281 ✗ case AV_LOG_VERBOSE:
282 ✗ return "verbose";
283 ✗ case AV_LOG_INFO:
284 ✗ return "info";
285 ✗ case AV_LOG_WARNING:
286 ✗ return "warning";
287 ✗ case AV_LOG_ERROR:
288 ✗ return "error";
289 ✗ case AV_LOG_FATAL:
290 ✗ return "fatal";
291 ✗ case AV_LOG_PANIC:
292 ✗ return "panic";
293 ✗ default:
294 ✗ return "";
295 }
296 }
297
298 25025 static const char *item_name(void *obj, const AVClass *cls)
299 {
300
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 25025 return (cls->item_name ? cls->item_name : av_default_item_name)(obj);
301 }
302
303 ✗ static void format_date_now(AVBPrint* bp_time, int include_date)
304 {
305 struct tm *ptm, tmbuf;
306 ✗ const int64_t time_us = av_gettime();
307 ✗ const int64_t time_ms = time_us / 1000;
308 ✗ const time_t time_s = time_ms / 1000;
309 ✗ const int millisec = time_ms - (time_s * 1000);
310 ✗ ptm = localtime_r(&time_s, &tmbuf);
311 ✗ if (ptm) {
312 ✗ if (include_date)
313 ✗ av_bprint_strftime(bp_time, "%Y-%m-%d ", ptm);
314
315 ✗ av_bprint_strftime(bp_time, "%H:%M:%S", ptm);
316 ✗ av_bprintf(bp_time, ".%03d ", millisec);
317 }
318 ✗ }
319
320 468582 static void format_line(void *avcl, int level, const char *fmt, va_list vl,
321 AVBPrint part[5], int *print_prefix, int type[2])
322 {
323
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 468582 AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
324 468582 av_bprint_init(part+0, 0, AV_BPRINT_SIZE_AUTOMATIC);
325 468582 av_bprint_init(part+1, 0, AV_BPRINT_SIZE_AUTOMATIC);
326 468582 av_bprint_init(part+2, 0, AV_BPRINT_SIZE_AUTOMATIC);
327 468582 av_bprint_init(part+3, 0, 65536);
328 468582 av_bprint_init(part+4, 0, AV_BPRINT_SIZE_AUTOMATIC);
329 468582 int flags = atomic_load_explicit(&av_log_flags, memory_order_relaxed);
330
331
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 468582 if(type) type[0] = type[1] = AV_CLASS_CATEGORY_NA + 16;
332
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 468582 if (*print_prefix && avc) {
333
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 24081 if (avc->parent_log_context_offset) {
334 3458 AVClass** parent = *(AVClass ***) (((uint8_t *) avcl) +
335 3458 avc->parent_log_context_offset);
336
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 3458 if (parent && *parent) {
337 944 av_bprintf(part+0, "[%s @ %p] ",
338 item_name(parent, *parent), parent);
339
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 944 if(type) type[0] = get_category(parent);
340 }
341 }
342 24081 av_bprintf(part+1, "[%s @ %p] ",
343 item_name(avcl, avc), avcl);
344
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 24081 if(type) type[1] = get_category(avcl);
345 }
346
347
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 468582 if (*print_prefix && (level > AV_LOG_QUIET) && (flags & (AV_LOG_PRINT_TIME | AV_LOG_PRINT_DATETIME)))
348 ✗ format_date_now(&part[4], flags & AV_LOG_PRINT_DATETIME);
349
350
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 468582 if (*print_prefix && (level > AV_LOG_QUIET) && (flags & AV_LOG_PRINT_LEVEL))
351 ✗ av_bprintf(part+2, "[%s] ", get_level_str(level));
352
353 468582 av_vbprintf(part+3, fmt, vl);
354
355
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 468582 if(*part[0].str || *part[1].str || *part[2].str || *part[3].str) {
356
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 450827 char lastc = part[3].len && part[3].len <= part[3].size ? part[3].str[part[3].len - 1] : 0;
357
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 450827 *print_prefix = lastc == '\n' || lastc == '\r';
358 }
359 468582 }
360
361 ✗ void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
362 char *line, int line_size, int *print_prefix)
363 {
364 ✗ av_log_format_line2(ptr, level, fmt, vl, line, line_size, print_prefix);
365 ✗ }
366
367 ✗ int av_log_format_line2(void *ptr, int level, const char *fmt, va_list vl,
368 char *line, int line_size, int *print_prefix)
369 {
370 AVBPrint part[5];
371 int ret;
372
373 ✗ format_line(ptr, level, fmt, vl, part, print_prefix, NULL);
374 ✗ ret = snprintf(line, line_size, "%s%s%s%s", part[0].str, part[1].str, part[2].str, part[3].str);
375 ✗ av_bprint_finalize(part+3, NULL);
376 ✗ return ret;
377 }
378
379 36810990 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
380 {
381 static int print_prefix = 1;
382 static int count;
383 static char prev[LINE_SZ];
384 AVBPrint part[5];
385 char line[LINE_SZ];
386 static int is_atty;
387 int type[2];
388 36810990 unsigned tint = 0;
389
390
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 36810990 if (level >= 0) {
391 36793537 tint = level & 0xff00;
392 36793537 level &= 0xff;
393 }
394
395
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 36810990 if (level > atomic_load_explicit(&av_log_level, memory_order_relaxed))
396 36342408 return;
397 468582 ff_mutex_lock(&mutex);
398
399 468582 format_line(ptr, level, fmt, vl, part, &print_prefix, type);
400 468582 snprintf(line, sizeof(line), "%s%s%s%s", part[0].str, part[1].str, part[2].str, part[3].str);
401
402 #if HAVE_ISATTY
403
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 468582 if (!is_atty)
404
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 9077 is_atty = isatty(2) ? 1 : -1;
405 #endif
406
407
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 468582 if (print_prefix && (atomic_load_explicit(&av_log_flags, memory_order_relaxed) & AV_LOG_SKIP_REPEATED) && !strcmp(line, prev) &&
408
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 2153 *line && line[strlen(line) - 1] != '\r'){
409 2075 count++;
410
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 2075 if (is_atty == 1)
411 ✗ fprintf(stderr, " Last message repeated %d times\r", count);
412 2075 goto end;
413 }
414
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 466507 if (count > 0) {
415 378 fprintf(stderr, " Last message repeated %d times\n", count);
416 378 count = 0;
417 }
418 466507 strcpy(prev, line);
419
420 466507 sanitize(part[4].str);
421 466507 colored_fputs(7, 0, part[4].str);
422 466507 sanitize(part[0].str);
423 466507 colored_fputs(type[0], 0, part[0].str);
424 466507 sanitize(part[1].str);
425 466507 colored_fputs(type[1], 0, part[1].str);
426 466507 sanitize(part[2].str);
427 466507 colored_fputs(av_clip(level >> 3, 0, NB_LEVELS - 1), tint >> 8, part[2].str);
428 466507 sanitize(part[3].str);
429 466507 colored_fputs(av_clip(level >> 3, 0, NB_LEVELS - 1), tint >> 8, part[3].str);
430
431 #if CONFIG_VALGRIND_BACKTRACE
432
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 466507 if (level <= BACKTRACE_LOGLEVEL)
433 21654 VALGRIND_PRINTF_BACKTRACE("%s", "");
434 #endif
435 444853 end:
436 468582 av_bprint_finalize(part+3, NULL);
437 468582 ff_mutex_unlock(&mutex);
438 }
439
440 static atomic_uintptr_t av_log_callback = (uintptr_t)av_log_default_callback;
441
442 39551710 void av_log(void* avcl, int level, const char *fmt, ...)
443 {
444 va_list vl;
445 39551710 va_start(vl, fmt);
446 39551710 av_vlog(avcl, level, fmt, vl);
447 39551710 va_end(vl);
448 39551710 }
449
450 38 void av_log_once(void* avcl, int initial_level, int subsequent_level, int *state, const char *fmt, ...)
451 {
452 va_list vl;
453 38 va_start(vl, fmt);
454
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 38 av_vlog(avcl, *state ? subsequent_level : initial_level, fmt, vl);
455 38 va_end(vl);
456 38 *state = 1;
457 38 }
458
459 39551902 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
460 {
461
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 39551902 AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
462 39551902 void (*log_callback)(void*, int, const char*, va_list) =
463 39551902 (void *)atomic_load_explicit(&av_log_callback, memory_order_relaxed);
464
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 39551902 if (avc && avc->version >= (50 << 16 | 15 << 8 | 2) &&
465
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 35490664 avc->log_level_offset_offset && level >= AV_LOG_FATAL)
466 421982 level += *(int *) (((uint8_t *) avcl) + avc->log_level_offset_offset);
467
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 39551902 if (log_callback)
468 39551899 log_callback(avcl, level, fmt, vl);
469 39551902 }
470
471 2888838 int av_log_get_level(void)
472 {
473 2888838 return atomic_load_explicit(&av_log_level, memory_order_relaxed);
474 }
475
476 8858 void av_log_set_level(int level)
477 {
478 8858 atomic_store_explicit(&av_log_level, level, memory_order_relaxed);
479 8858 }
480
481 9155 void av_log_set_flags(int arg)
482 {
483 9155 atomic_store_explicit(&av_log_flags, arg, memory_order_relaxed);
484 9155 }
485
486 296 int av_log_get_flags(void)
487 {
488 296 return atomic_load_explicit(&av_log_flags, memory_order_relaxed);
489 }
490
491 108 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
492 {
493 108 atomic_store_explicit(&av_log_callback, (uintptr_t)callback, memory_order_relaxed);
494 108 }
495
496 14 static void missing_feature_sample(int sample, void *avc, const char *msg,
497 va_list argument_list)
498 {
499 14 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
500 14 av_log(avc, AV_LOG_WARNING, " is not implemented. Update your FFmpeg "
501 "version to the newest one from Git. If the problem still "
502 "occurs, it means that your file has a feature which has not "
503 "been implemented.\n");
504
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 14 if (sample)
505 ✗ av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
506 "of this file to https://streams.videolan.org/upload/ "
507 "and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)\n");
508 14 }
509
510 ✗ void avpriv_request_sample(void *avc, const char *msg, ...)
511 {
512 va_list argument_list;
513
514 ✗ va_start(argument_list, msg);
515 ✗ missing_feature_sample(1, avc, msg, argument_list);
516 ✗ va_end(argument_list);
517 ✗ }
518
519 14 void avpriv_report_missing_feature(void *avc, const char *msg, ...)
520 {
521 va_list argument_list;
522
523 14 va_start(argument_list, msg);
524 14 missing_feature_sample(0, avc, msg, argument_list);
525 14 va_end(argument_list);
526 14 }
527