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Add ma_node_detach_all_output_buses().

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This commit is contained in:
David Reid
2021-01-06 21:19:55 +10:00
parent fb336f54e3
commit fb1e61cb06
1 changed files with 43 additions and 27 deletions
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research/miniaudio_engine.h
+43 -27
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@@ -792,6 +792,7 @@ MA_API ma_uint32 ma_node_get_input_channels(const ma_node* pNode, ma_uint32 inpu
MA_API ma_uint32 ma_node_get_output_channels(const ma_node* pNode, ma_uint32 outputBusIndex);
MA_API ma_result ma_node_attach_output_bus(ma_node* pNode, ma_uint32 outputBusIndex, ma_node* pOtherNode, ma_uint32 otherNodeInputBusIndex);
MA_API ma_result ma_node_detach_output_bus(ma_node* pNode, ma_uint32 outputBusIndex);
MA_API ma_result ma_node_detach_all_output_buses(ma_node* pNode);
MA_API ma_result ma_node_set_state(ma_node* pNode, ma_node_state state);
MA_API ma_node_state ma_node_get_state(const ma_node* pNode);
MA_API ma_result ma_node_set_output_bus_volume(ma_node* pNode, ma_uint32 outputBusIndex, float volume);
@@ -3376,6 +3377,46 @@ MA_API ma_uint32 ma_node_get_output_channels(const ma_node* pNode, ma_uint32 out
}
static ma_result ma_node_detach_full(ma_node* pNode)
{
ma_node_base* pNodeBase = (ma_node_base*)pNode;
ma_uint32 iInputBus;
if (pNodeBase == NULL) {
return MA_INVALID_ARGS;
}
/*
Make sure the node is completely detached first. This will not return until the output bus is
guaranteed to no longer be referenced by the audio thread.
*/
ma_node_detach_all_output_buses(pNode);
/*
At this point all output buses will have been detached from the graph and we can be guaranteed
that none of it's input nodes will be getting processed by the graph. We can detach these
without needing to worry about the audio thread touching them.
*/
for (iInputBus = 0; iInputBus < ma_node_get_input_bus_count(pNode); iInputBus += 1) {
ma_node_input_bus* pInputBus;
ma_node_output_bus* pOutputBus;
pInputBus = &pNodeBase->inputBuses[iInputBus];
/*
This is important. We cannot be using ma_node_input_bus_first() or ma_node_input_bus_next(). Those
functions are specifically for the audio thread. We'll instead just manually iterate using standard
linked list logic. We don't need to worry about the audio thread referencing these because the step
above severed the connection to the graph.
*/
for (pOutputBus = (ma_node_output_bus*)c89atomic_load_ptr(&pInputBus->head.pNext); pOutputBus != NULL; pOutputBus = (ma_node_output_bus*)c89atomic_load_ptr(&pOutputBus->pNext)) {
ma_node_detach_output_bus(pOutputBus->pNode, pOutputBus->outputBusIndex); /* This won't do any waiting in practice and should be efficient. */
}
}
return MA_SUCCESS;
}
MA_API ma_result ma_node_detach_output_bus(ma_node* pNode, ma_uint32 outputBusIndex)
{
ma_result result = MA_SUCCESS;
@@ -3403,43 +3444,18 @@ MA_API ma_result ma_node_detach_output_bus(ma_node* pNode, ma_uint32 outputBusIn
return result;
}
MA_API ma_result ma_node_detach_full(ma_node* pNode)
MA_API ma_result ma_node_detach_all_output_buses(ma_node* pNode)
{
ma_node_base* pNodeBase = (ma_node_base*)pNode;
ma_uint32 iInputBus;
ma_uint32 iOutputBus;
if (pNodeBase == NULL) {
if (pNode == NULL) {
return MA_INVALID_ARGS;
}
/* Make sure the node is completely detached first. */
for (iOutputBus = 0; iOutputBus < ma_node_get_output_bus_count(pNode); iOutputBus += 1) {
ma_node_detach_output_bus(pNode, iOutputBus);
}
/*
At this point all output buses will have been detached from the graph and we can be guaranteed
that none of it's input nodes will be getting processed by the graph. We can detach these
without needing to worry about the audio thread touching them.
*/
for (iInputBus = 0; iInputBus < ma_node_get_input_bus_count(pNode); iInputBus += 1) {
ma_node_input_bus* pInputBus;
ma_node_output_bus* pOutputBus;
pInputBus = &pNodeBase->inputBuses[iInputBus];
/*
This is important. We cannot be using ma_node_input_bus_first() or ma_node_input_bus_next(). Those
functions are specifically for the audio thread. We'll instead just manually iterate using standard
linked list logic. We don't need to worry about the audio thread referencing these because the step
above severed the connection to the graph.
*/
for (pOutputBus = (ma_node_output_bus*)c89atomic_load_ptr(&pInputBus->head.pNext); pOutputBus != NULL; pOutputBus = (ma_node_output_bus*)c89atomic_load_ptr(&pOutputBus->pNext)) {
ma_node_detach_output_bus(pOutputBus->pNode, pOutputBus->outputBusIndex); /* This won't do any waiting in practice and should be efficient. */
}
}
return MA_SUCCESS;
}