forked from mirrors/gecko-dev
c7ed87060f
Rebased from https://hg.mozilla.org/mozilla-central/rev/b34601c7751d Differential Revision: https://phabricator.services.mozilla.com/D241144
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "VALibWrapper.h"
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#include "FFmpegLog.h"
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#include "PlatformDecoderModule.h"
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#include "prlink.h"
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#include "mozilla/gfx/gfxVars.h"
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namespace mozilla {
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VALibWrapper VALibWrapper::sFuncs;
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void VALibWrapper::Link() {
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#define VA_FUNC_OPTION_SILENT(func) \
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if (!((func) = (decltype(func))PR_FindSymbol(mVALib, #func))) { \
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(func) = (decltype(func))nullptr; \
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}
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// mVALib is optional and may not be present.
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if (mVALib) {
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VA_FUNC_OPTION_SILENT(vaExportSurfaceHandle)
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VA_FUNC_OPTION_SILENT(vaSyncSurface)
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VA_FUNC_OPTION_SILENT(vaInitialize)
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VA_FUNC_OPTION_SILENT(vaTerminate)
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}
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#undef VA_FUNC_OPTION_SILENT
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#define VAD_FUNC_OPTION_SILENT(func) \
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if (!((func) = (decltype(func))PR_FindSymbol(mVALibDrm, #func))) { \
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FFMPEGP_LOG("Couldn't load function " #func); \
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}
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// mVALibDrm is optional and may not be present.
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if (mVALibDrm) {
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VAD_FUNC_OPTION_SILENT(vaGetDisplayDRM)
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}
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#undef VAD_FUNC_OPTION_SILENT
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}
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bool VALibWrapper::LinkVAAPILibs() {
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if (!gfx::gfxVars::CanUseHardwareVideoDecoding() || !XRE_IsRDDProcess()) {
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return false;
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}
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PRLibSpec lspec;
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lspec.type = PR_LibSpec_Pathname;
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const char* libDrm = "libva-drm.so.2";
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lspec.value.pathname = libDrm;
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mVALibDrm = PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
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if (!mVALibDrm) {
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FFMPEGP_LOG("VA-API support: Missing or old %s library.\n", libDrm);
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return false;
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}
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const char* lib = "libva.so.2";
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lspec.value.pathname = lib;
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mVALib = PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
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// Don't use libva when it's missing vaExportSurfaceHandle.
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if (mVALib && !PR_FindSymbol(mVALib, "vaExportSurfaceHandle")) {
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PR_UnloadLibrary(mVALib);
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mVALib = nullptr;
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}
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if (!mVALib) {
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FFMPEGP_LOG("VA-API support: Missing or old %s library.\n", lib);
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return false;
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}
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Link();
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return true;
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}
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bool VALibWrapper::AreVAAPIFuncsAvailable() {
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#define VA_FUNC_LOADED(func) ((func) != nullptr)
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return VA_FUNC_LOADED(vaExportSurfaceHandle) &&
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VA_FUNC_LOADED(vaSyncSurface) && VA_FUNC_LOADED(vaInitialize) &&
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VA_FUNC_LOADED(vaTerminate) && VA_FUNC_LOADED(vaGetDisplayDRM);
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}
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/* static */
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bool VALibWrapper::IsVAAPIAvailable() {
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static bool once = sFuncs.LinkVAAPILibs();
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(void)once;
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return sFuncs.AreVAAPIFuncsAvailable();
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}
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} // namespace mozilla
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