1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/fmp4/ffmpeg/FFmpegRuntimeLinker.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,85 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include <dlfcn.h>
1.11 +
1.12 +#include "nsDebug.h"
1.13 +
1.14 +#include "FFmpegRuntimeLinker.h"
1.15 +
1.16 +// For FFMPEG_LOG
1.17 +#include "FFmpegDecoderModule.h"
1.18 +
1.19 +#define NUM_ELEMENTS(X) (sizeof(X) / sizeof((X)[0]))
1.20 +
1.21 +#define LIBAVCODEC 0
1.22 +#define LIBAVFORMAT 1
1.23 +#define LIBAVUTIL 2
1.24 +
1.25 +namespace mozilla
1.26 +{
1.27 +
1.28 +FFmpegRuntimeLinker::LinkStatus FFmpegRuntimeLinker::sLinkStatus =
1.29 + LinkStatus_INIT;
1.30 +
1.31 +static const char * const sLibNames[] = {
1.32 + "libavcodec.so.53", "libavformat.so.53", "libavutil.so.51",
1.33 +};
1.34 +
1.35 +void* FFmpegRuntimeLinker::sLinkedLibs[NUM_ELEMENTS(sLibNames)] = {
1.36 + nullptr, nullptr, nullptr
1.37 +};
1.38 +
1.39 +#define AV_FUNC(lib, func) typeof(func) func;
1.40 +#include "FFmpegFunctionList.h"
1.41 +#undef AV_FUNC
1.42 +
1.43 +/* static */ bool
1.44 +FFmpegRuntimeLinker::Link()
1.45 +{
1.46 + if (sLinkStatus) {
1.47 + return sLinkStatus == LinkStatus_SUCCEEDED;
1.48 + }
1.49 +
1.50 + for (uint32_t i = 0; i < NUM_ELEMENTS(sLinkedLibs); i++) {
1.51 + if (!(sLinkedLibs[i] = dlopen(sLibNames[i], RTLD_NOW | RTLD_LOCAL))) {
1.52 + NS_WARNING("Couldn't link ffmpeg libraries.");
1.53 + goto fail;
1.54 + }
1.55 + }
1.56 +
1.57 +#define AV_FUNC(lib, func) \
1.58 + func = (typeof(func))dlsym(sLinkedLibs[lib], #func); \
1.59 + if (!func) { \
1.60 + NS_WARNING("Couldn't load FFmpeg function " #func "."); \
1.61 + goto fail; \
1.62 + }
1.63 +#include "FFmpegFunctionList.h"
1.64 +#undef AV_FUNC
1.65 +
1.66 + sLinkStatus = LinkStatus_SUCCEEDED;
1.67 + return true;
1.68 +
1.69 +fail:
1.70 + Unlink();
1.71 +
1.72 + sLinkStatus = LinkStatus_FAILED;
1.73 + return false;
1.74 +}
1.75 +
1.76 +/* static */ void
1.77 +FFmpegRuntimeLinker::Unlink()
1.78 +{
1.79 + FFMPEG_LOG("Unlinking ffmpeg libraries.");
1.80 + for (uint32_t i = 0; i < NUM_ELEMENTS(sLinkedLibs); i++) {
1.81 + if (sLinkedLibs[i]) {
1.82 + dlclose(sLinkedLibs[i]);
1.83 + sLinkedLibs[i] = nullptr;
1.84 + }
1.85 + }
1.86 +}
1.87 +
1.88 +} // namespace mozilla
