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/* -*- Mode: C++; tab-width: 50; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "OpenSLESProvider.h"
#include "mozilla/Logging.h"
#include "nsDebug.h"
#include <dlfcn.h>
#include <SLES/OpenSLES_Android.h>
#include <SLES/OpenSLES_AndroidConfiguration.h>
// MOZ_LOG=OpenSLESProvider:5
#undef LOG
#undef LOG_ENABLED
mozilla::LazyLogModule gOpenSLESProviderLog("OpenSLESProvider");
#define LOG(args) MOZ_LOG(gOpenSLESProviderLog, mozilla::LogLevel::Debug, args)
#define LOG_ENABLED() MOZ_LOG_TEST(gOpenSLESProviderLog, mozilla::LogLevel::Debug)
namespace mozilla {
OpenSLESProvider::OpenSLESProvider()
: mLock("OpenSLESProvider.mLock"),
mSLEngine(nullptr),
mSLEngineUsers(0),
mIsRealized(false),
mOpenSLESLib(nullptr)
{
LOG(("OpenSLESProvider being initialized"));
}
OpenSLESProvider::~OpenSLESProvider()
{
if (mOpenSLESLib) {
LOG(("OpenSLES Engine was not properly Destroyed"));
(void)dlclose(mOpenSLESLib);
}
}
/* static */
OpenSLESProvider& OpenSLESProvider::getInstance()
{
// This doesn't need a Mutex in C++11 or GCC 4.3+, see N2660 and
// https://gcc.gnu.org/projects/cxx0x.html
static OpenSLESProvider instance;
return instance;
}
/* static */
SLresult OpenSLESProvider::Get(SLObjectItf * aObjectm,
SLuint32 aOptionCount,
const SLEngineOption *aOptions)
{
OpenSLESProvider& provider = OpenSLESProvider::getInstance();
return provider.GetEngine(aObjectm, aOptionCount, aOptions);
}
SLresult OpenSLESProvider::GetEngine(SLObjectItf * aObjectm,
SLuint32 aOptionCount,
const SLEngineOption *aOptions)
{
MutexAutoLock lock(mLock);
LOG(("Getting OpenSLES engine"));
// Bug 1042051: Validate options are the same
if (mSLEngine != nullptr) {
*aObjectm = mSLEngine;
mSLEngineUsers++;
LOG(("Returning existing engine, %d users", mSLEngineUsers));
return SL_RESULT_SUCCESS;
} else {
int res = ConstructEngine(aObjectm, aOptionCount, aOptions);
if (res == SL_RESULT_SUCCESS) {
// Bug 1042051: Store engine options
mSLEngine = *aObjectm;
mSLEngineUsers++;
LOG(("Returning new engine"));
} else {
LOG(("Error getting engine: %d", res));
}
return res;
}
}
SLresult OpenSLESProvider::ConstructEngine(SLObjectItf * aObjectm,
SLuint32 aOptionCount,
const SLEngineOption *aOptions)
{
mLock.AssertCurrentThreadOwns();
if (!mOpenSLESLib) {
mOpenSLESLib = dlopen("libOpenSLES.so", RTLD_LAZY);
if (!mOpenSLESLib) {
LOG(("Failed to dlopen OpenSLES library"));
return SL_RESULT_MEMORY_FAILURE;
}
}
typedef SLresult (*slCreateEngine_t)(SLObjectItf *,
SLuint32,
const SLEngineOption *,
SLuint32,
const SLInterfaceID *,
const SLboolean *);
slCreateEngine_t f_slCreateEngine =
(slCreateEngine_t)dlsym(mOpenSLESLib, "slCreateEngine");
int result = f_slCreateEngine(aObjectm, aOptionCount, aOptions, 0, NULL, NULL);
return result;
}
/* static */
void OpenSLESProvider::Destroy(SLObjectItf * aObjectm)
{
OpenSLESProvider& provider = OpenSLESProvider::getInstance();
provider.DestroyEngine(aObjectm);
}
void OpenSLESProvider::DestroyEngine(SLObjectItf * aObjectm)
{
MutexAutoLock lock(mLock);
NS_ASSERTION(mOpenSLESLib, "OpenSLES destroy called but library is not open");
mSLEngineUsers--;
LOG(("Freeing engine, %d users left", mSLEngineUsers));
if (mSLEngineUsers) {
return;
}
(*(*aObjectm))->Destroy(*aObjectm);
// This assumes SLObjectItf is a pointer, but given the previous line,
// that's a given.
*aObjectm = nullptr;
(void)dlclose(mOpenSLESLib);
mOpenSLESLib = nullptr;
mIsRealized = false;
}
/* static */
SLresult OpenSLESProvider::Realize(SLObjectItf aObjectm)
{
OpenSLESProvider& provider = OpenSLESProvider::getInstance();
return provider.RealizeEngine(aObjectm);
}
SLresult OpenSLESProvider::RealizeEngine(SLObjectItf aObjectm)
{
MutexAutoLock lock(mLock);
NS_ASSERTION(mOpenSLESLib, "OpenSLES realize called but library is not open");
NS_ASSERTION(aObjectm != nullptr, "OpenSLES realize engine with empty ObjectItf");
if (mIsRealized) {
LOG(("Not realizing already realized engine"));
return SL_RESULT_SUCCESS;
} else {
SLresult res = (*aObjectm)->Realize(aObjectm, SL_BOOLEAN_FALSE);
if (res != SL_RESULT_SUCCESS) {
LOG(("Error realizing OpenSLES engine: %d", res));
} else {
LOG(("Realized OpenSLES engine"));
mIsRealized = true;
}
return res;
}
}
} // namespace mozilla
extern "C" {
SLresult mozilla_get_sles_engine(SLObjectItf * aObjectm,
SLuint32 aOptionCount,
const SLEngineOption *aOptions)
{
return mozilla::OpenSLESProvider::Get(aObjectm, aOptionCount, aOptions);
}
void mozilla_destroy_sles_engine(SLObjectItf * aObjectm)
{
mozilla::OpenSLESProvider::Destroy(aObjectm);
}
SLresult mozilla_realize_sles_engine(SLObjectItf aObjectm)
{
return mozilla::OpenSLESProvider::Realize(aObjectm);
}
}
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