add some code

managed_components/78__esp-opus-encoder/opus_resampler.cc

@@ -0,0 +1,34 @@
+#include "opus_resampler.h"
+#include "silk_resampler.h"
+#include "esp_log.h"
+
+#define TAG "OpusResampler"
+
+OpusResampler::OpusResampler() {
+}
+
+OpusResampler::~OpusResampler() {
+}
+
+void OpusResampler::Configure(int input_sample_rate, int output_sample_rate) {
+    int encode = input_sample_rate > output_sample_rate ? 1 : 0;
+    auto ret = silk_resampler_init(&resampler_state_, input_sample_rate, output_sample_rate, encode);
+    if (ret != 0) {
+        ESP_LOGE(TAG, "Failed to initialize resampler");
+        return;
+    }
+    input_sample_rate_ = input_sample_rate;
+    output_sample_rate_ = output_sample_rate;
+    ESP_LOGI(TAG, "Resampler configured with input sample rate %d and output sample rate %d", input_sample_rate_, output_sample_rate_);
+}
+
+void OpusResampler::Process(const int16_t *input, int input_samples, int16_t *output) {
+    auto ret = silk_resampler(&resampler_state_, output, input, input_samples);
+    if (ret != 0) {
+        ESP_LOGE(TAG, "Failed to process resampler");
+    }
+}
+
+int OpusResampler::GetOutputSamples(int input_samples) const {
+    return input_samples * output_sample_rate_ / input_sample_rate_;
+}