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Add support for using ma_node_graph as a node.

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This allows the node graph to be connected to another node graph.
This commit is contained in:
David Reid
2022-01-18 18:31:18 +10:00
parent c25fe30aa6
commit 3947725f04
1 changed files with 40 additions and 0 deletions
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miniaudio.h
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@@ -10364,6 +10364,7 @@ MA_API ma_node_graph_config ma_node_graph_config_init(ma_uint32 channels);
struct ma_node_graph
{
/* Immutable. */
ma_node_base base; /* The node graph itself is a node so it can be connected as an input to different node graph. This has zero inputs and calls ma_node_graph_read_pcm_frames() to generate it's output. */
ma_node_base endpoint; /* Special node that all nodes eventually connect to. Data is read from this node in ma_node_graph_read_pcm_frames(). */
ma_uint16 nodeCacheCapInFrames;
@@ -67733,6 +67734,28 @@ static ma_bool32 ma_node_graph_is_reading(ma_node_graph* pNodeGraph)
#endif
static void ma_node_graph_node_process_pcm_frames(ma_node* pNode, const float** ppFramesIn, ma_uint32* pFrameCountIn, float** ppFramesOut, ma_uint32* pFrameCountOut)
{
ma_node_graph* pNodeGraph = (ma_node_graph*)pNode;
ma_uint64 framesRead;
ma_node_graph_read_pcm_frames(pNodeGraph, ppFramesOut[0], *pFrameCountOut, &framesRead);
*pFrameCountOut = (ma_uint32)framesRead; /* Safe cast. */
(void)ppFramesIn;
(void)pFrameCountIn;
}
static ma_node_vtable g_node_graph_node_vtable =
{
ma_node_graph_node_process_pcm_frames,
NULL, /* onGetRequiredInputFrameCount */
0, /* 1 input buses. */
1, /* 1 output bus. */
0 /* Flags. */
};
static void ma_node_graph_endpoint_process_pcm_frames(ma_node* pNode, const float** ppFramesIn, ma_uint32* pFrameCountIn, float** ppFramesOut, ma_uint32* pFrameCountOut)
{
MA_ASSERT(pNode != NULL);
@@ -67769,7 +67792,9 @@ static ma_node_vtable g_node_graph_endpoint_vtable =
MA_API ma_result ma_node_graph_init(const ma_node_graph_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_node_graph* pNodeGraph)
{
ma_result result;
ma_node_config baseConfig;
ma_node_config endpointConfig;
ma_uint32 baseInputChannels = 0;
if (pNodeGraph == NULL) {
return MA_INVALID_ARGS;
@@ -67781,6 +67806,20 @@ MA_API ma_result ma_node_graph_init(const ma_node_graph_config* pConfig, const m
pNodeGraph->nodeCacheCapInFrames = MA_DEFAULT_NODE_CACHE_CAP_IN_FRAMES_PER_BUS;
}
/* Base node so we can use the node graph as a node into another graph. */
baseConfig = ma_node_config_init();
baseConfig.vtable = &g_node_graph_node_vtable;
baseConfig.pInputChannels = &baseInputChannels; /* <-- Always zero. */
baseConfig.pOutputChannels = &pConfig->channels;
result = ma_node_init(pNodeGraph, &baseConfig, pAllocationCallbacks, &pNodeGraph->base);
if (result != MA_SUCCESS) {
return result;
}
/* Endpoint. */
endpointConfig = ma_node_config_init();
endpointConfig.vtable = &g_node_graph_endpoint_vtable;
endpointConfig.pInputChannels = &pConfig->channels;
@@ -67788,6 +67827,7 @@ MA_API ma_result ma_node_graph_init(const ma_node_graph_config* pConfig, const m
result = ma_node_init(pNodeGraph, &endpointConfig, pAllocationCallbacks, &pNodeGraph->endpoint);
if (result != MA_SUCCESS) {
ma_node_uninit(&pNodeGraph->base, pAllocationCallbacks);
return result;
}