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Break Linux? Fix volume catcher? Only time will tell

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This commit is contained in:
Lirusaito
2019-04-17 18:41:13 -04:00
parent f670c774d3
commit e5f3d1d8bc
2 changed files with 72 additions and 151 deletions
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119
indra/plugins/cef/linux_volume_catcher.cpp
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@@ -155,55 +155,40 @@ extern "C" {
}
class VolumeCatcherImpl
class VolumeCatcherImpl : public LLSingleton<VolumeCatcherImpl>
{
public:
friend LLSingleton<VolumeCatcherImpl>;
VolumeCatcherImpl();
// This is a singleton class -- both callers and the component implementation should use getInstance() to find the instance.
~VolumeCatcherImpl();
public:
void setVolume(F32 volume);
void pump(void);
void setPan(F32 pan) {};
// for internal use - can't be private because used from our C callbacks
bool loadsyms(std::string pulse_dso_name);
void init();
void cleanup();
void update_all_volumes(F32 volume);
void update_index_volume(U32 index, F32 volume);
void connected_okay();
std::set<U32> mSinkInputIndices;
std::map<U32,U32> mSinkInputNumChannels;
F32 mDesiredVolume;
F32 mVolume;
pa_glib_mainloop *mMainloop;
pa_context *mPAContext;
bool mConnected;
bool mGotSyms;
F32 mPan;
};
VolumeCatcherImpl::VolumeCatcherImpl()
: mDesiredVolume(0.0f),
mMainloop(NULL),
mPAContext(NULL),
: mVolume(0.0f),
mMainloop(nullptr),
mPAContext(nullptr),
mConnected(false),
mGotSyms(false)
{
init();
}
VolumeCatcherImpl::~VolumeCatcherImpl()
{
cleanup();
}
bool VolumeCatcherImpl::loadsyms(std::string pulse_dso_name)
{
return grab_pa_syms(pulse_dso_name);
}
void VolumeCatcherImpl::init()
mGotSyms(false),
mPan(0.f) // default pan is centered
{
// try to be as defensive as possible because PA's interface is a
// bit fragile and (for our purposes) we'd rather simply not function
@@ -213,7 +198,7 @@ void VolumeCatcherImpl::init()
// libpulse.so.0 - this isn't a great assumption, and the two DSOs should
// probably be loaded separately. Our Linux DSO framework needs refactoring,
// we do this sort of thing a lot with practically identical logic...
mGotSyms = loadsyms("libpulse-mainloop-glib.so.0");
mGotSyms = grab_pa_syms("libpulse-mainloop-glib.so.0");
if (!mGotSyms) return;
// better make double-sure glib itself is initialized properly.
@@ -245,7 +230,7 @@ void VolumeCatcherImpl::init()
// PA context to a PA daemon.
if (mPAContext)
{
llpa_context_set_state_callback(mPAContext, callback_context_state, this);
llpa_context_set_state_callback(mPAContext, callback_context_state, nullptr);
pa_context_flags_t cflags = (pa_context_flags)0; // maybe add PA_CONTEXT_NOAUTOSPAWN?
if (llpa_context_connect(mPAContext, NULL, cflags, NULL) >= 0)
{
@@ -260,7 +245,7 @@ void VolumeCatcherImpl::init()
}
}
void VolumeCatcherImpl::cleanup()
VolumeCatcherImpl::~VolumeCatcherImpl()
{
mConnected = false;
@@ -269,33 +254,30 @@ void VolumeCatcherImpl::cleanup()
llpa_context_disconnect(mPAContext);
llpa_context_unref(mPAContext);
}
mPAContext = NULL;
mPAContext = nullptr;
if (mGotSyms && mMainloop)
{
llpa_glib_mainloop_free(mMainloop);
}
mMainloop = NULL;
mMainloop = nullptr;
}
void VolumeCatcherImpl::setVolume(F32 volume)
{
mDesiredVolume = volume;
mVolume = volume;
if (!mGotSyms) return;
if (mConnected && mPAContext)
{
update_all_volumes(mDesiredVolume);
for (auto& input : mSinkInputIndices)
{
update_index_volume(input, mVolume);
}
}
pump();
}
void VolumeCatcherImpl::pump()
{
gboolean may_block = FALSE;
g_main_context_iteration(g_main_context_default(), may_block);
g_main_context_iteration(g_main_context_default(), /*may_block = */false);
}
void VolumeCatcherImpl::connected_okay()
@@ -305,7 +287,7 @@ void VolumeCatcherImpl::connected_okay()
// fetch global list of existing sinkinputs
if ((op = llpa_context_get_sink_input_info_list(mPAContext,
callback_discovered_sinkinput,
this)))
nullptr)))
{
llpa_operation_unref(op);
}
@@ -313,7 +295,7 @@ void VolumeCatcherImpl::connected_okay()
// subscribe to future global sinkinput changes
llpa_context_set_subscribe_callback(mPAContext,
callback_subscription_alert,
this);
nullptr);
if ((op = llpa_context_subscribe(mPAContext, (pa_subscription_mask_t)
(PA_SUBSCRIPTION_MASK_SINK_INPUT),
NULL, NULL)))
@@ -322,15 +304,6 @@ void VolumeCatcherImpl::connected_okay()
}
}
void VolumeCatcherImpl::update_all_volumes(F32 volume)
{
for (std::set<U32>::iterator it = mSinkInputIndices.begin();
it != mSinkInputIndices.end(); ++it)
{
update_index_volume(*it, volume);
}
}
void VolumeCatcherImpl::update_index_volume(U32 index, F32 volume)
{
static pa_cvolume cvol;
@@ -340,10 +313,10 @@ void VolumeCatcherImpl::update_index_volume(U32 index, F32 volume)
pa_context *c = mPAContext;
uint32_t idx = index;
const pa_cvolume *cvolumep = &cvol;
pa_context_success_cb_t cb = NULL; // okay as null
void *userdata = NULL; // okay as null
pa_context_success_cb_t cb = nullptr; // okay as null
void* userdata = nullptr; // okay as null
pa_operation *op;
pa_operation* op;
if ((op = llpa_context_set_sink_input_volume(c, idx, cvolumep, cb, userdata)))
{
llpa_operation_unref(op);
@@ -353,9 +326,6 @@ void VolumeCatcherImpl::update_index_volume(U32 index, F32 volume)
void callback_discovered_sinkinput(pa_context *context, const pa_sink_input_info *sii, int eol, void *userdata)
{
VolumeCatcherImpl *impl = dynamic_cast<VolumeCatcherImpl*>((VolumeCatcherImpl*)userdata);
llassert(impl);
if (0 == eol)
{
pa_proplist *proplist = sii->proplist;
@@ -363,6 +333,7 @@ void callback_discovered_sinkinput(pa_context *context, const pa_sink_input_info
if (sinkpid == getpid()) // does the discovered sinkinput belong to this process?
{
auto impl = VolumeCatcherImpl::getInstance();
bool is_new = (impl->mSinkInputIndices.find(sii->index) ==
impl->mSinkInputIndices.end());
@@ -371,12 +342,7 @@ void callback_discovered_sinkinput(pa_context *context, const pa_sink_input_info
if (is_new)
{
// new!
impl->update_index_volume(sii->index, impl->mDesiredVolume);
}
else
{
// seen it already, do nothing.
impl->update_index_volume(sii->index, impl->mVolume);
}
}
}
@@ -384,8 +350,7 @@ void callback_discovered_sinkinput(pa_context *context, const pa_sink_input_info
void callback_subscription_alert(pa_context *context, pa_subscription_event_type_t t, uint32_t index, void *userdata)
{
VolumeCatcherImpl *impl = dynamic_cast<VolumeCatcherImpl*>((VolumeCatcherImpl*)userdata);
llassert(impl);
VolumeCatcherImpl *impl = VolumeCatcherImpl::getInstance();
switch (t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) {
case PA_SUBSCRIPTION_EVENT_SINK_INPUT:
@@ -401,15 +366,11 @@ void callback_subscription_alert(pa_context *context, pa_subscription_event_type
{
// ask for more info about this new sinkinput
pa_operation *op;
if ((op = llpa_context_get_sink_input_info(impl->mPAContext, index, callback_discovered_sinkinput, impl)))
if ((op = llpa_context_get_sink_input_info(impl->mPAContext, index, callback_discovered_sinkinput, nullptr)))
{
llpa_operation_unref(op);
}
}
else
{
// property change on this sinkinput - we don't care.
}
break;
default:;
@@ -418,8 +379,7 @@ void callback_subscription_alert(pa_context *context, pa_subscription_event_type
void callback_context_state(pa_context *context, void *userdata)
{
VolumeCatcherImpl *impl = dynamic_cast<VolumeCatcherImpl*>((VolumeCatcherImpl*)userdata);
llassert(impl);
VolumeCatcherImpl *impl = VolumeCatcherImpl::getInstance();
switch (llpa_context_get_state(context))
{
@@ -441,28 +401,25 @@ void callback_context_state(pa_context *context, void *userdata)
VolumeCatcher::VolumeCatcher()
{
pimpl = new VolumeCatcherImpl();
pimpl = VolumeCatcherImpl::getInstance();
}
VolumeCatcher::~VolumeCatcher()
{
delete pimpl;
pimpl = NULL;
// Let the instance persist until exit.
}
void VolumeCatcher::setVolume(F32 volume)
{
llassert(pimpl);
pimpl->setVolume(volume);
}
void VolumeCatcher::setPan(F32 pan)
{
// TODO: implement this (if possible)
pimpl->setPan(pan);
}
void VolumeCatcher::pump()
{
llassert(pimpl);
pimpl->pump();
g_main_context_iteration(g_main_context_default(), /*may_block = */false);
}