feat: add Wan2.2 S2V (audio+img-to-video) support (#1925)

Co-authored-by: leejet <leejet714@gmail.com>

src/pipeline/diffusion_engine.h

@@ -27,6 +27,9 @@ struct LoraModel;
 struct ConditionerParams;
 struct SDCondition;
 struct RefImageParams;
+namespace Wav2Vec2 {
+    class Wav2Vec2ModelRunner;
+}
 
 extern const char* model_version_to_str[];
 
@@ -63,6 +66,7 @@ public:
     std::shared_ptr<VAE> first_stage_model;
     std::shared_ptr<VAE> preview_vae;
     std::shared_ptr<AudioVAERunner> audio_vae_model;
+    std::shared_ptr<Wav2Vec2::Wav2Vec2ModelRunner> audio_encoder;
     std::shared_ptr<ControlNet> control_net;
     std::shared_ptr<IPAdapter::IPAdapterRunner> ip_adapter;
     sd::Tensor<float> ip_adapter_tokens;
@@ -363,6 +367,8 @@ public:
                                              int clip_skip        = -1,
                                              bool zero_out_masked = false);
 
+    sd::Tensor<float> get_audio_embedding(const sd_audio_t& audio);
+
     void compute_ip_adapter_tokens(const sd_image_t& image, float strength);
 
     std::vector<float> process_timesteps(const std::vector<float>& timesteps,