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/*
* av_log to mp_msg converter
* Copyright (C) 2006 Michael Niedermayer
* Copyright (C) 2009 Uoti Urpala
*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <pthread.h>
#include "av_log.h"
#include "config.h"
#include "common/common.h"
#include "common/global.h"
#include "common/msg.h"
#include <libavutil/avutil.h>
#include <libavutil/log.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
#include <libavfilter/avfilter.h>
#if HAVE_LIBAVDEVICE
#include <libavdevice/avdevice.h>
#endif
#if HAVE_LIBAVRESAMPLE
#include <libavresample/avresample.h>
#endif
#if HAVE_LIBSWRESAMPLE
#include <libswresample/swresample.h>
#endif
#if LIBAVCODEC_VERSION_MICRO >= 100
#define LIB_PREFIX "ffmpeg"
#else
#define LIB_PREFIX "libav"
#endif
// Needed because the av_log callback does not provide a library-safe message
// callback.
static pthread_mutex_t log_lock = PTHREAD_MUTEX_INITIALIZER;
static struct mpv_global *log_mpv_instance;
static struct mp_log *log_root, *log_decaudio, *log_decvideo, *log_demuxer;
static bool log_print_prefix = true;
static int av_log_level_to_mp_level(int av_level)
{
if (av_level > AV_LOG_VERBOSE)
return MSGL_DEBUG;
if (av_level > AV_LOG_INFO)
return MSGL_V;
if (av_level > AV_LOG_WARNING)
return MSGL_V;
if (av_level > AV_LOG_ERROR)
return MSGL_WARN;
if (av_level > AV_LOG_FATAL)
return MSGL_ERR;
return MSGL_FATAL;
}
static struct mp_log *get_av_log(void *ptr)
{
if (!ptr)
return log_root;
AVClass *avc = *(AVClass **)ptr;
if (!avc) {
mp_warn(log_root,
"av_log callback called with bad parameters (NULL AVClass).\n"
"This is a bug in one of Libav/FFmpeg libraries used.\n");
return log_root;
}
if (!strcmp(avc->class_name, "AVCodecContext")) {
AVCodecContext *s = ptr;
if (s->codec) {
if (s->codec->type == AVMEDIA_TYPE_AUDIO) {
if (s->codec->decode)
return log_decaudio;
} else if (s->codec->type == AVMEDIA_TYPE_VIDEO) {
if (s->codec->decode)
return log_decvideo;
}
}
}
if (!strcmp(avc->class_name, "AVFormatContext")) {
AVFormatContext *s = ptr;
if (s->iformat)
return log_demuxer;
}
return log_root;
}
static void mp_msg_av_log_callback(void *ptr, int level, const char *fmt,
va_list vl)
{
AVClass *avc = ptr ? *(AVClass **)ptr : NULL;
int mp_level = av_log_level_to_mp_level(level);
// Note: mp_log is thread-safe, but destruction of the log instances is not.
pthread_mutex_lock(&log_lock);
if (!log_mpv_instance) {
pthread_mutex_unlock(&log_lock);
// Fallback to stderr
vfprintf(stderr, fmt, vl);
return;
}
struct mp_log *log = get_av_log(ptr);
if (mp_msg_test(log, mp_level)) {
char buffer[4096] = "";
int pos = 0;
const char *prefix = avc ? avc->item_name(ptr) : NULL;
if (log_print_prefix && prefix)
pos = snprintf(buffer, sizeof(buffer), "%s: ", prefix);
log_print_prefix = fmt[strlen(fmt) - 1] == '\n';
pos = MPMIN(MPMAX(pos, 0), sizeof(buffer));
vsnprintf(buffer + pos, sizeof(buffer) - pos, fmt, vl);
mp_msg(log, mp_level, "%s", buffer);
}
pthread_mutex_unlock(&log_lock);
}
void init_libav(struct mpv_global *global)
{
pthread_mutex_lock(&log_lock);
if (!log_mpv_instance) {
log_mpv_instance = global;
log_root = mp_log_new(NULL, global->log, LIB_PREFIX);
log_decaudio = mp_log_new(log_root, log_root, "audio");
log_decvideo = mp_log_new(log_root, log_root, "video");
log_demuxer = mp_log_new(log_root, log_root, "demuxer");
av_log_set_callback(mp_msg_av_log_callback);
}
pthread_mutex_unlock(&log_lock);
avcodec_register_all();
av_register_all();
avformat_network_init();
avfilter_register_all();
#if HAVE_LIBAVDEVICE
avdevice_register_all();
#endif
}
void uninit_libav(struct mpv_global *global)
{
pthread_mutex_lock(&log_lock);
if (log_mpv_instance == global) {
av_log_set_callback(av_log_default_callback);
log_mpv_instance = NULL;
talloc_free(log_root);
}
pthread_mutex_unlock(&log_lock);
}
#define V(x) (x)>>16, (x)>>8 & 255, (x) & 255
struct lib {
const char *name;
unsigned buildv;
unsigned runv;
};
void print_libav_versions(struct mp_log *log, int v)
{
const struct lib libs[] = {
{"libavutil", LIBAVUTIL_VERSION_INT, avutil_version()},
{"libavcodec", LIBAVCODEC_VERSION_INT, avcodec_version()},
{"libavformat", LIBAVFORMAT_VERSION_INT, avformat_version()},
{"libswscale", LIBSWSCALE_VERSION_INT, swscale_version()},
{"libavfilter", LIBAVFILTER_VERSION_INT, avfilter_version()},
#if HAVE_LIBAVRESAMPLE
{"libavresample", LIBAVRESAMPLE_VERSION_INT, avresample_version()},
#endif
#if HAVE_LIBSWRESAMPLE
{"libswresample", LIBSWRESAMPLE_VERSION_INT, swresample_version()},
#endif
};
mp_msg(log, v, "%s library versions:\n", LIB_PREFIX);
bool mismatch = false;
for (int n = 0; n < MP_ARRAY_SIZE(libs); n++) {
const struct lib *l = &libs[n];
mp_msg(log, v, " %-15s %d.%d.%d", l->name, V(l->buildv));
if (l->buildv != l->runv) {
mp_msg(log, v, " (runtime %d.%d.%d)", V(l->runv));
mismatch = true;
}
mp_msg(log, v, "\n");
}
#if HAVE_AV_VERSION_INFO
mp_msg(log, v, "%s version: %s\n", LIB_PREFIX, av_version_info());
#endif
if (mismatch) {
// Using mismatched libraries can be legitimate, but even then it's
// a bad idea. We don't acknowledge its usefulness and stability.
mp_warn(log, "Warning: mpv was compiled against a different version of "
"%s than the shared\nlibrary it is linked against. This is "
"most likely a broken build\nand misbehavior and crashes are "
"to be expected.\n", LIB_PREFIX);
}
}
#undef V
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