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PulseAudio: Improve iterator loop

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We now store sthe pa_operation and check if they were done'd, cancelled or still running.
This commit is contained in:
scorpion-26 2023-02-21 22:46:40 +01:00
parent 16933c24ff
commit f5adfebfe9
1 changed files with 40 additions and 17 deletions
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57
src/PulseAudio.h
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@ -5,21 +5,39 @@
#include <pulse/pulseaudio.h>
#include <stdlib.h>
#include <algorithm>
#include <list>
namespace PulseAudio
{
static pa_mainloop* mainLoop;
static pa_context* context;
static int32_t pending = 0;
static std::list<pa_operation*> pendingOperations;
inline void FlushLoop()
{
while (pending > 0)
while (pendingOperations.size() > 0)
{
pa_mainloop_iterate(mainLoop, 0, nullptr);
// Remove done or cancelled operations
pendingOperations.remove_if(
[](pa_operation* op)
{
pa_operation_state_t state = pa_operation_get_state(op);
if (state == PA_OPERATION_DONE)
{
pa_operation_unref(op);
return true;
}
else if (state == PA_OPERATION_CANCELLED)
{
LOG("Warning: Cancelled pa_operation!");
pa_operation_unref(op);
return true;
}
return false;
});
}
pending = 0;
}
inline void Init()
@ -30,7 +48,8 @@ namespace PulseAudio
context = pa_context_new(api, "gBar PA context");
int res = pa_context_connect(context, nullptr, PA_CONTEXT_NOAUTOSPAWN, nullptr);
auto stateCallback = [](pa_context* c, void*)
bool ready = false;
auto stateCallback = [](pa_context* c, void* ready)
{
switch (pa_context_get_state(c))
{
@ -43,17 +62,17 @@ namespace PulseAudio
// Don't care
break;
case PA_CONTEXT_READY:
// Prevent pending from going negative when PA_CONTEXT_READY is called multiple times
if (pending > 0)
pending--;
LOG("PulseAudio: Context is ready!");
*(bool*)ready = true;
break;
}
};
pa_context_set_state_callback(context, +stateCallback, &ready);
pa_context_set_state_callback(context, +stateCallback, nullptr);
pending++;
FlushLoop();
while (!ready)
{
pa_mainloop_iterate(mainLoop, 0, nullptr);
}
ASSERT(res >= 0, "pa_context_connect failed!");
}
@ -65,12 +84,15 @@ namespace PulseAudio
// 1. Get default sink
auto serverInfo = [](pa_context*, const pa_server_info* info, void* sink)
{
pending--;
if (!info)
return;
*(const char**)sink = info->default_sink_name;
};
pa_context_get_server_info(context, +serverInfo, &defaultSink);
pending++;
pa_operation* op = pa_context_get_server_info(context, +serverInfo, &defaultSink);
pa_operation_ref(op);
pendingOperations.push_back(op);
FlushLoop();
@ -85,11 +107,12 @@ namespace PulseAudio
out->volume = vol;
out->muted = info->mute;
pending--;
};
pa_context_get_sink_info_by_name(context, defaultSink, +sinkInfo, &info);
op = pa_context_get_sink_info_by_name(context, defaultSink, +sinkInfo, &info);
pa_operation_ref(op);
pendingOperations.push_back(op);
pending++;
FlushLoop();
return info;