Add dummy audio processor

main/audio_processing/dummy_audio_processor.cc

@@ -0,0 +1,44 @@
+#include "dummy_audio_processor.h"
+#include <esp_log.h>
+
+static const char* TAG = "DummyAudioProcessor";
+
+void DummyAudioProcessor::Initialize(AudioCodec* codec, bool realtime_chat) {
+    codec_ = codec;
+}
+
+void DummyAudioProcessor::Feed(const std::vector<int16_t>& data) {
+    if (!is_running_ || !output_callback_) {
+        return;
+    }
+    // 直接将输入数据传递给输出回调
+    output_callback_(std::vector<int16_t>(data));
+}
+
+void DummyAudioProcessor::Start() {
+    is_running_ = true;
+}
+
+void DummyAudioProcessor::Stop() {
+    is_running_ = false;
+}
+
+bool DummyAudioProcessor::IsRunning() {
+    return is_running_;
+}
+
+void DummyAudioProcessor::OnOutput(std::function<void(std::vector<int16_t>&& data)> callback) {
+    output_callback_ = callback;
+}
+
+void DummyAudioProcessor::OnVadStateChange(std::function<void(bool speaking)> callback) {
+    vad_state_change_callback_ = callback;
+}
+
+size_t DummyAudioProcessor::GetFeedSize() {
+    if (!codec_) {
+        return 0;
+    }
+    // 返回一个固定的帧大小，比如 30ms 的数据
+    return 30 * codec_->input_sample_rate() / 1000;
+}