mirror of
https://github.com/mpv-player/mpv
synced 2024-12-30 02:52:10 +00:00
2868fbea3f
Print a warning if a library has mismatched compile time and link time versions. Refuse to work if the compile time and link time versions are a mix of ffmpeg and libav. We print an error message and call exit(). Since we'd randomly crash anyway, I think this is ok. This doesn't catch the case if you e.g. use a ffmpeg libavcodec and a libav libavformat, which would of course just crash as quickly, but I think this checks enough already.
244 lines
7.1 KiB
C
244 lines
7.1 KiB
C
/*
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* av_log to mp_msg converter
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* Copyright (C) 2006 Michael Niedermayer
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* Copyright (C) 2009 Uoti Urpala
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <pthread.h>
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#include "av_log.h"
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#include "config.h"
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#include "common/common.h"
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#include "common/global.h"
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#include "common/msg.h"
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#include <libavutil/avutil.h>
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#include <libavutil/log.h>
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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#if HAVE_LIBAVDEVICE
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#include <libavdevice/avdevice.h>
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#endif
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#if HAVE_LIBAVFILTER
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#include <libavfilter/avfilter.h>
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#endif
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#if HAVE_LIBAVRESAMPLE
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#include <libavresample/avresample.h>
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#endif
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#if HAVE_LIBSWRESAMPLE
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#include <libswresample/swresample.h>
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#endif
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#if LIBAVCODEC_VERSION_MICRO >= 100
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#define LIB_PREFIX "ffmpeg"
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#else
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#define LIB_PREFIX "libav"
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#endif
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// Needed because the av_log callback does not provide a library-safe message
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// callback.
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static pthread_mutex_t log_lock = PTHREAD_MUTEX_INITIALIZER;
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static struct mpv_global *log_mpv_instance;
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static struct mp_log *log_root, *log_decaudio, *log_decvideo, *log_demuxer;
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static bool log_print_prefix = true;
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static int av_log_level_to_mp_level(int av_level)
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{
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if (av_level > AV_LOG_VERBOSE)
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return MSGL_DEBUG;
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if (av_level > AV_LOG_INFO)
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return MSGL_V;
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if (av_level > AV_LOG_WARNING)
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return MSGL_V;
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if (av_level > AV_LOG_ERROR)
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return MSGL_WARN;
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if (av_level > AV_LOG_FATAL)
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return MSGL_ERR;
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return MSGL_FATAL;
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}
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static struct mp_log *get_av_log(void *ptr)
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{
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if (!ptr)
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return log_root;
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AVClass *avc = *(AVClass **)ptr;
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if (!avc) {
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mp_warn(log_root,
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"av_log callback called with bad parameters (NULL AVClass).\n"
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"This is a bug in one of Libav/FFmpeg libraries used.\n");
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return log_root;
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}
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if (!strcmp(avc->class_name, "AVCodecContext")) {
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AVCodecContext *s = ptr;
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if (s->codec) {
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if (s->codec->type == AVMEDIA_TYPE_AUDIO) {
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if (s->codec->decode)
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return log_decaudio;
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} else if (s->codec->type == AVMEDIA_TYPE_VIDEO) {
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if (s->codec->decode)
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return log_decvideo;
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}
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}
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}
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if (!strcmp(avc->class_name, "AVFormatContext")) {
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AVFormatContext *s = ptr;
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if (s->iformat)
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return log_demuxer;
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}
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return log_root;
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}
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static void mp_msg_av_log_callback(void *ptr, int level, const char *fmt,
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va_list vl)
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{
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AVClass *avc = ptr ? *(AVClass **)ptr : NULL;
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int mp_level = av_log_level_to_mp_level(level);
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// Note: mp_log is thread-safe, but destruction of the log instances is not.
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pthread_mutex_lock(&log_lock);
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if (!log_mpv_instance) {
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pthread_mutex_unlock(&log_lock);
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// Fallback to stderr
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vfprintf(stderr, fmt, vl);
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return;
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}
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struct mp_log *log = get_av_log(ptr);
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if (mp_msg_test(log, mp_level)) {
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if (log_print_prefix)
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mp_msg(log, mp_level, "%s: ", avc ? avc->item_name(ptr) : "?");
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log_print_prefix = fmt[strlen(fmt) - 1] == '\n';
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mp_msg_va(log, mp_level, fmt, vl);
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}
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pthread_mutex_unlock(&log_lock);
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}
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void init_libav(struct mpv_global *global)
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{
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pthread_mutex_lock(&log_lock);
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if (!log_mpv_instance) {
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log_mpv_instance = global;
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log_root = mp_log_new(NULL, global->log, LIB_PREFIX);
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log_decaudio = mp_log_new(log_root, log_root, "audio");
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log_decvideo = mp_log_new(log_root, log_root, "video");
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log_demuxer = mp_log_new(log_root, log_root, "demuxer");
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av_log_set_callback(mp_msg_av_log_callback);
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}
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pthread_mutex_unlock(&log_lock);
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avcodec_register_all();
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av_register_all();
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avformat_network_init();
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#if HAVE_LIBAVFILTER
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avfilter_register_all();
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#endif
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#if HAVE_LIBAVDEVICE
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avdevice_register_all();
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#endif
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}
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void uninit_libav(struct mpv_global *global)
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{
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pthread_mutex_lock(&log_lock);
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if (log_mpv_instance == global) {
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log_mpv_instance = NULL;
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talloc_free(log_root);
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}
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pthread_mutex_unlock(&log_lock);
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}
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#define V(x) (x)>>16, (x)>>8 & 255, (x) & 255
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struct lib {
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const char *name;
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unsigned buildv;
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unsigned runv;
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};
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void print_libav_versions(struct mp_log *log, int v)
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{
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const struct lib libs[] = {
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{"libavutil", LIBAVUTIL_VERSION_INT, avutil_version()},
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{"libavcodec", LIBAVCODEC_VERSION_INT, avcodec_version()},
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{"libavformat", LIBAVFORMAT_VERSION_INT, avformat_version()},
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{"libswscale", LIBSWSCALE_VERSION_INT, swscale_version()},
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#if HAVE_LIBAVFILTER
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{"libavfilter", LIBAVFILTER_VERSION_INT, avfilter_version()},
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#endif
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#if HAVE_LIBAVRESAMPLE
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{"libavresample", LIBAVRESAMPLE_VERSION_INT, avresample_version()},
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#endif
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#if HAVE_LIBSWRESAMPLE
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{"libswresample", LIBSWRESAMPLE_VERSION_INT, swresample_version()},
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#endif
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};
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mp_msg(log, v, "%s library versions:\n", LIB_PREFIX);
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bool mismatch = false;
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bool broken = false;
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for (int n = 0; n < MP_ARRAY_SIZE(libs); n++) {
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const struct lib *l = &libs[n];
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mp_msg(log, v, " %-15s %d.%d.%d", l->name, V(l->buildv));
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if (l->buildv != l->runv) {
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mp_msg(log, v, " (runtime %d.%d.%d)", V(l->runv));
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mismatch = true;
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broken |= ((l->buildv & 255) >= 100) != ((l->runv & 255) >= 100);
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}
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mp_msg(log, v, "\n");
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}
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// This just won't work. It's 100% broken.
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if (broken) {
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mp_fatal(log, "mpv was compiled and linked against a mixture of Libav "
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"and FFmpeg versions. This won't work and will most likely "
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"crash at some point. Exiting.\n");
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exit(42);
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}
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// We don't "really" support mismatched libraries, but if you like to
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// suffer, you're free to enjoy the terrible aspects of dynamic linking.
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// In particular, we don't use all these crazy accessors ffmpeg wants us
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// to use in order to be ABI compatible after Libav merges - because that
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// would make our code incompatible to Libav. It's madness.
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if (mismatch) {
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mp_warn(log, "Warning: mpv was compiled against a different version of "
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"%s than the shared\nlibrary it is linked against. This can "
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"expose subtle ABI compatibility issues\nand can lead to "
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"misbehavior and crashes.\n", LIB_PREFIX);
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}
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}
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#undef V
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