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#if !__has_feature(objc_arc)
#error This file must be compiled with automatic reference counting enabled (-fobjc-arc)
#endif
#import "whisper-encoder.h"
#import "whisper-encoder-impl.h"
#import <CoreML/CoreML.h>
#include <stdlib.h>
#if __cplusplus
extern "C" {
#endif
struct whisper_coreml_context {
const void * data;
};
struct whisper_coreml_context * whisper_coreml_init(const char * path_model) {
NSString * path_model_str = [[NSString alloc] initWithUTF8String:path_model];
NSURL * url_model = [NSURL fileURLWithPath: path_model_str];
// select which device to run the Core ML model on
MLModelConfiguration *config = [[MLModelConfiguration alloc] init];
// config.computeUnits = MLComputeUnitsCPUAndGPU;
//config.computeUnits = MLComputeUnitsCPUAndNeuralEngine;
config.computeUnits = MLComputeUnitsAll;
const void * data = CFBridgingRetain([[whisper_encoder_impl alloc] initWithContentsOfURL:url_model configuration:config error:nil]);
if (data == NULL) {
return NULL;
}
whisper_coreml_context * ctx = new whisper_coreml_context;
ctx->data = data;
return ctx;
}
void whisper_coreml_free(struct whisper_coreml_context * ctx) {
CFRelease(ctx->data);
delete ctx;
}
void whisper_coreml_encode(
const whisper_coreml_context * ctx,
int64_t n_ctx,
int64_t n_mel,
float * mel,
float * out) {
MLMultiArray * inMultiArray = [
[MLMultiArray alloc] initWithDataPointer: mel
shape: @[@1, @(n_mel), @(n_ctx)]
dataType: MLMultiArrayDataTypeFloat32
strides: @[@(n_ctx*n_mel), @(n_ctx), @1]
deallocator: nil
error: nil
];
@autoreleasepool {
whisper_encoder_implOutput * outCoreML = [(__bridge id) ctx->data predictionFromLogmel_data:inMultiArray error:nil];
memcpy(out, outCoreML.output.dataPointer, outCoreML.output.count * sizeof(float));
}
}
#if __cplusplus
}
#endif
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