whisper : mem usage based on model format type

examples/whisper/whisper.cpp

@@ -252,26 +252,26 @@ static const std::map<e_model, size_t> MEM_REQ_SCRATCH3 = {
     { MODEL_LARGE,     9ull*MB },
 };
 
-// TODO determine this on runtime
-#if 0 // F16
-static const std::map<e_model, size_t> MEM_REQ_MODEL = {
+static const std::map<ggml_type, std::map<e_model, size_t>> MEM_REQ_MODEL = {
+    { GGML_TYPE_F16,
+        {
             { MODEL_TINY,     74ull*MB },
             { MODEL_BASE,    142ull*MB },
             { MODEL_SMALL,   466ull*MB },
             { MODEL_MEDIUM, 1464ull*MB },
             { MODEL_LARGE,  2952ull*MB },
-};
-
-#else // Q4
-
-static const std::map<e_model, size_t> MEM_REQ_MODEL = {
-    { MODEL_TINY,      1ull*MB }, // TODO
-    { MODEL_BASE,      1ull*MB }, // TODO
+        },
+    },
+    { GGML_TYPE_Q4_0,
+        {
+            { MODEL_TINY,     26ull*MB },
+            { MODEL_BASE,     50ull*MB },
             { MODEL_SMALL,   154ull*MB },
             { MODEL_MEDIUM,  470ull*MB },
             { MODEL_LARGE,   940ull*MB },
+        },
+    },
 };
-#endif
 
 static const std::map<e_model, size_t> MEM_REQ_KV_SELF = {
     { MODEL_TINY,      3ull*MB },
@@ -829,7 +829,7 @@ static bool whisper_model_load(struct whisper_model_loader * loader, whisper_con
                      MEM_REQ_SCRATCH1.at (model.type) +
                      MEM_REQ_SCRATCH2.at (model.type) +
                      MEM_REQ_SCRATCH3.at (model.type) +
-                scale*MEM_REQ_MODEL.at   (model.type) +
+                scale*MEM_REQ_MODEL.at(wctx.wtype).at(model.type) +
                 scale*MEM_REQ_KV_CROSS.at(model.type) +
                 scale*std::max(MEM_REQ_ENCODE.at(model.type), MEM_REQ_DECODE.at(model.type));
 
@@ -845,7 +845,7 @@ static bool whisper_model_load(struct whisper_model_loader * loader, whisper_con
         // always have at least one decoder
 
         wctx.model.buf = new std::vector<uint8_t>();
-        wctx.model.buf->resize(scale*MEM_REQ_MODEL.at(model.type));
+        wctx.model.buf->resize(scale*MEM_REQ_MODEL.at(wctx.wtype).at(model.type));
 
         if (!kv_cache_init(model.hparams, scale*MEM_REQ_KV_SELF.at(model.type), wctx.decoders[0].kv_self, GGML_TYPE_F16, model.hparams.n_text_ctx)) {
             fprintf(stderr, "%s: kv_cache_init() failed for self-attention cache\n", __func__);