64 lines
2.3 KiB
C
64 lines
2.3 KiB
C
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/* Compile-time native effect example. No module loading or external SDK. */
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#include "xtc/xtc_native.h"
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#include <stdio.h>
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#include <stdlib.h>
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typedef struct {
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float gain;
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} gain_state;
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static xtc_result prepare(double rate, size_t frames, float gain, void **out)
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{
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gain_state *state = malloc(sizeof(*state));
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(void)rate;
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(void)frames;
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if (!state)
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return XTC_ERR_OUT_OF_MEMORY;
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state->gain = gain;
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*out = state;
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return XTC_OK;
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}
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static void reset(void *state) { (void)state; }
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static void destroy(void *state) { free(state); }
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static xtc_result process(void *context, const xtc_native_block *block)
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{
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const gain_state *state = context;
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size_t i;
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for (i = 0; i < block->frames; ++i)
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block->output[i] = block->input ? block->input[i] * state->gain : 0;
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return XTC_OK;
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}
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int main(void)
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{
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const xtc_native_descriptor descriptor = {XTC_NATIVE_ABI_VERSION,
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sizeof(xtc_native_descriptor),
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"org.xtc.example-gain",
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XTC_NATIVE_EFFECT,
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prepare,
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reset,
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process,
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destroy};
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xtc_graph *graph = NULL;
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xtc_plan *plan = NULL;
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size_t effect, output;
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float input[4] = {1, 0.5f, -1, 0}, rendered[4];
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xtc_result result = xtc_graph_create(2, &graph);
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if (result == XTC_OK)
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result = xtc_graph_add_native(graph, &descriptor, 0.25f, &effect);
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if (result == XTC_OK)
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result = xtc_graph_add_output(graph, &output);
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if (result == XTC_OK)
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result = xtc_graph_connect(graph, effect, output);
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if (result == XTC_OK)
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result = xtc_graph_compile(graph, 48000, 4, &plan);
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if (result == XTC_OK)
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result = xtc_plan_process(plan, input, rendered, 4);
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if (result == XTC_OK && (rendered[0] != 0.25f || rendered[2] != -0.25f))
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result = XTC_ERR_INVALID_STATE;
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xtc_plan_destroy(plan);
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xtc_graph_destroy(graph);
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if (result != XTC_OK) {
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fprintf(stderr, "Native example: %s\n", xtc_result_string(result));
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return EXIT_FAILURE;
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}
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puts("Native gain graph: 0.25, 0.125, -0.25, 0");
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return EXIT_SUCCESS;
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}
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