Remove unnecessary example.

The delay node is demonstrated in the engine_effects example.

extras/nodes/ma_delay_node/ma_delay_node_example.c

-
-#include "../../../miniaudio.c"
-
-#include <stdio.h>
-
-#define DEVICE_FORMAT       ma_format_f32       /* Must always be f32 for this example because the node graph system only works with this. */
-#define DEVICE_CHANNELS     2
-#define DEVICE_SAMPLE_RATE  48000
-
-static ma_audio_buffer_ref g_dataSupply;        /* The underlying data source of the source node. */
-static ma_data_source_node g_dataSupplyNode;    /* The node that will sit at the root level. Will be reading data from g_dataSupply. */
-static ma_delay_node       g_delayNode;         /* The delay node. */
-static ma_node_graph       g_nodeGraph;         /* The main node graph that we'll be feeding data through. */
-
-void data_callback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uint32 frameCount)
-{
-    /*
-    This example assumes the playback and capture sides use the same format and channel count. The
-    format must be f32.
-    */
-    if (pDevice->capture.format != DEVICE_FORMAT || pDevice->playback.format != DEVICE_FORMAT || pDevice->capture.channels != pDevice->playback.channels) {
-        return;
-    }
-
-    /*
-    The node graph system is a pulling style of API. At the lowest level of the chain will be a 
-    node acting as a data source for the purpose of delivering the initial audio data. In our case,
-    the data source is our `pInput` buffer. We need to update the underlying data source so that it
-    read data from `pInput`.
-    */
-    ma_audio_buffer_ref_set_data(&g_dataSupply, pInput, frameCount);
-
-    /* With the source buffer configured we can now read directly from the node graph. */
-    ma_node_graph_read_pcm_frames(&g_nodeGraph, pOutput, frameCount, NULL);
-}
-
-int main(int argc, char** argv)
-{
-    ma_result result;
-    ma_device_config deviceConfig;
-    ma_device device;
-    ma_node_graph_config nodeGraphConfig;
-    ma_delay_node_config delayNodeConfig;
-    ma_data_source_node_config dataSupplyNodeConfig;
-
-    deviceConfig = ma_device_config_init(ma_device_type_duplex);
-    deviceConfig.capture.pDeviceID  = NULL;
-    deviceConfig.capture.format     = DEVICE_FORMAT;
-    deviceConfig.capture.channels   = DEVICE_CHANNELS;
-    deviceConfig.capture.shareMode  = ma_share_mode_shared;
-    deviceConfig.playback.pDeviceID = NULL;
-    deviceConfig.playback.format    = DEVICE_FORMAT;
-    deviceConfig.playback.channels  = DEVICE_CHANNELS;
-    deviceConfig.dataCallback       = data_callback;
-    result = ma_device_init(NULL, &deviceConfig, &device);
-    if (result != MA_SUCCESS) {
-        return result;
-    }
-
-    
-    /* Node graph. */
-    nodeGraphConfig = ma_node_graph_config_init(device.capture.channels);
-
-    result = ma_node_graph_init(&nodeGraphConfig, NULL, &g_nodeGraph);
-    if (result != MA_SUCCESS) {
-        printf("Failed to initialize node graph.");
-        goto done0;
-    }
-
-
-    /* Delay. Attached straight to the endpoint. */
-    delayNodeConfig = ma_delay_node_config_init(device.capture.channels, device.sampleRate, (100 * device.sampleRate) / 1000, 0.5f);
-
-    result = ma_delay_node_init(&g_nodeGraph, &delayNodeConfig, NULL, &g_delayNode);
-    if (result != MA_SUCCESS) {
-        printf("Failed to initialize delay node.");
-        goto done1;
-    }
-
-    ma_node_attach_output_bus(&g_delayNode, 0, ma_node_graph_get_endpoint(&g_nodeGraph), 0);
-
-
-    /* Data supply. Attached to input bus 0 of the delay node. */
-    result = ma_audio_buffer_ref_init(device.capture.format, device.capture.channels, NULL, 0, &g_dataSupply);
-    if (result != MA_SUCCESS) {
-        printf("Failed to initialize audio buffer for source.");
-        goto done2;
-    }
-
-    dataSupplyNodeConfig = ma_data_source_node_config_init(&g_dataSupply);
-
-    result = ma_data_source_node_init(&g_nodeGraph, &dataSupplyNodeConfig, NULL, &g_dataSupplyNode);
-    if (result != MA_SUCCESS) {
-        printf("Failed to initialize source node.");
-        goto done2;
-    }
-
-    ma_node_attach_output_bus(&g_dataSupplyNode, 0, &g_delayNode, 0);
-
-
-
-
-    ma_device_start(&device);
-
-    printf("Press Enter to quit...\n");
-    getchar();
-
-    /* It's important that we stop the device first or else we'll uninitialize the graph from under the device. */
-    ma_device_stop(&device);
-
-/*done3:*/ ma_data_source_node_uninit(&g_dataSupplyNode, NULL);
-done2: ma_delay_node_uninit(&g_delayNode, NULL);
-done1: ma_node_graph_uninit(&g_nodeGraph, NULL);
-done0: ma_device_uninit(&device);
-
-    (void)argc;
-    (void)argv;
-
-    return 0;
-}