add some code

main/audio/processors/no_audio_processor.cc

@@ -0,0 +1,59 @@
+#include "no_audio_processor.h"
+#include <esp_log.h>
+
+#define TAG "NoAudioProcessor"
+
+void NoAudioProcessor::Initialize(AudioCodec* codec, int frame_duration_ms) {
+    codec_ = codec;
+    frame_samples_ = frame_duration_ms * 16000 / 1000;
+}
+
+void NoAudioProcessor::Feed(std::vector<int16_t>&& data) {
+    if (!is_running_ || !output_callback_) {
+        return;
+    }
+
+    if (codec_->input_channels() == 2) {
+        // If input channels is 2, we need to fetch the left channel data
+        auto mono_data = std::vector<int16_t>(data.size() / 2);
+        for (size_t i = 0, j = 0; i < mono_data.size(); ++i, j += 2) {
+            mono_data[i] = data[j];
+        }
+        output_callback_(std::move(mono_data));
+    } else {
+        output_callback_(std::move(data));
+    }
+}
+
+void NoAudioProcessor::Start() {
+    is_running_ = true;
+}
+
+void NoAudioProcessor::Stop() {
+    is_running_ = false;
+}
+
+bool NoAudioProcessor::IsRunning() {
+    return is_running_;
+}
+
+void NoAudioProcessor::OnOutput(std::function<void(std::vector<int16_t>&& data)> callback) {
+    output_callback_ = callback;
+}
+
+void NoAudioProcessor::OnVadStateChange(std::function<void(bool speaking)> callback) {
+    vad_state_change_callback_ = callback;
+}
+
+size_t NoAudioProcessor::GetFeedSize() {
+    if (!codec_) {
+        return 0;
+    }
+    return frame_samples_;
+}
+
+void NoAudioProcessor::EnableDeviceAec(bool enable) {
+    if (enable) {
+        ESP_LOGE(TAG, "Device AEC is not supported");
+    }
+}