Building with MSVC

CMakeLists.txt

@@ -26,19 +26,21 @@ option(WHISPER_SUPPORT_SDL2            "whisper: support for libSDL2" OFF)
 
 # sanitizers
 
-if (WHISPER_SANITIZE_THREAD)
-    set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -fsanitize=thread")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread")
-endif()
+if (NOT MSVC)
+    if (WHISPER_SANITIZE_THREAD)
+        set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -fsanitize=thread")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread")
+    endif()
 
-if (WHISPER_SANITIZE_ADDRESS)
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}     -fsanitize=address -fno-omit-frame-pointer")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
-endif()
+    if (WHISPER_SANITIZE_ADDRESS)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}     -fsanitize=address -fno-omit-frame-pointer")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
+    endif()
 
-if (WHISPER_SANITIZE_UNDEFINED)
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}     -fsanitize=undefined")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined")
+    if (WHISPER_SANITIZE_UNDEFINED)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}     -fsanitize=undefined")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined")
+    endif()
 endif()
 
 #set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ffast-math")
@@ -47,7 +49,7 @@ endif()
 # dependencies
 
 set(CMAKE_C_STANDARD   11)
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 20)
 
 find_package(Threads REQUIRED)
 
@@ -69,7 +71,7 @@ if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
 endif ()
 
 if (WHISPER_ALL_WARNINGS)
-    if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
+    if (NOT MSVC)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} \
             -Wall                           \
             -Wextra                         \
@@ -80,12 +82,14 @@ if (WHISPER_ALL_WARNINGS)
             -Wpointer-arith                 \
         ")
     else()
-        # todo : windows
+        # todo : msvc
     endif()
 endif()
 
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror=vla")
-#set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-math-errno -ffinite-math-only -funsafe-math-optimizations")
+if (NOT MSVC)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror=vla")
+    #set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-math-errno -ffinite-math-only -funsafe-math-optimizations")
+endif()
 
 message(STATUS "CMAKE_SYSTEM_PROCESSOR: ${CMAKE_SYSTEM_PROCESSOR}")
 
@@ -93,7 +97,11 @@ if (${CMAKE_SYSTEM_PROCESSOR} MATCHES "arm" OR ${CMAKE_SYSTEM_PROCESSOR} MATCHES
     message(STATUS "ARM detected")
 else()
     message(STATUS "x86 detected")
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mavx -mavx2 -mfma -mf16c")
+    if (MSVC)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /arch:AVX2 /D_CRT_SECURE_NO_WARNINGS=1")
+    else()
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mavx -mavx2 -mfma -mf16c")
+    endif()
 endif()
 
 # whisper - this is the main library of the project

ggml.c

@@ -13,9 +13,15 @@
 #include <string.h>
 #include <stdint.h>
 #include <stdio.h>
-#include <stdatomic.h>
 
+
+#if defined _MSC_VER
+#include "msvc_thread_atomic.h"
+#else
 #include <pthread.h>
+#include <stdatomic.h>
+typedef void* thread_ret_t;
+#endif
 
 #define GGML_DEBUG 0
 
@@ -149,6 +155,25 @@ static ggml_fp16_t table_exp_f16[1 << 16];
 // timing
 //
 
+#if defined(_MSC_VER)
+static int64_t timer_freq;
+void ggml_time_init(void) {
+    LARGE_INTEGER frequency;
+    QueryPerformanceFrequency(&frequency);
+    timer_freq = frequency.QuadPart;
+}
+int64_t ggml_time_ms(void) {
+    LARGE_INTEGER t;
+    QueryPerformanceCounter(&t);
+    return (t.QuadPart * 1000) / timer_freq;
+}
+int64_t ggml_time_us(void) {
+    LARGE_INTEGER t;
+    QueryPerformanceCounter(&t);
+    return (t.QuadPart * 1000000) / timer_freq;
+}
+#else
+void ggml_time_init(void) {}
 int64_t ggml_time_ms(void) {
     struct timespec ts;
     clock_gettime(CLOCK_MONOTONIC, &ts);
@@ -160,6 +185,7 @@ int64_t ggml_time_us(void) {
     clock_gettime(CLOCK_MONOTONIC, &ts);
     return (int64_t)ts.tv_sec*1000000 + (int64_t)ts.tv_nsec/1000;
 }
+#endif
 
 int64_t ggml_cycles(void) {
     return clock();
@@ -6412,7 +6438,7 @@ void * ggml_graph_compute_one(void * data) {
     return NULL;
 }
 
-void * ggml_graph_compute_thread(void * data) {
+thread_ret_t ggml_graph_compute_thread(void * data) {
     struct ggml_compute_state * state = (struct ggml_compute_state *) data;
 
     const int n_threads = state->shared->n_threads;
@@ -6423,7 +6449,7 @@ void * ggml_graph_compute_thread(void * data) {
         } else {
             while (atomic_load(&state->shared->has_work)) {
                 if (atomic_load(&state->shared->stop)) {
-                    return NULL;
+                    return 0;
                 }
                 ggml_lock_lock  (&state->shared->spin);
                 ggml_lock_unlock(&state->shared->spin);
@@ -6435,7 +6461,7 @@ void * ggml_graph_compute_thread(void * data) {
         // wait for work
         while (!atomic_load(&state->shared->has_work)) {
             if (atomic_load(&state->shared->stop)) {
-                return NULL;
+                return 0;
             }
             ggml_lock_lock  (&state->shared->spin);
             ggml_lock_unlock(&state->shared->spin);
@@ -6454,7 +6480,7 @@ void * ggml_graph_compute_thread(void * data) {
         }
     }
 
-    return NULL;
+    return 0;
 }
 
 void ggml_graph_compute(struct ggml_context * ctx, struct ggml_cgraph * cgraph) {

ggml.h

@@ -136,6 +136,7 @@ struct ggml_init_params {
     void * mem_buffer; // if NULL, memory will be allocated internally
 };
 
+void ggml_time_init(void);
 int64_t ggml_time_ms(void);
 int64_t ggml_time_us(void);
 int64_t ggml_cycles(void);

msvc_thread_atomic.h

@@ -0,0 +1,31 @@
+#pragma once
+#include <Windows.h>
+
+typedef volatile LONG atomic_int;
+typedef atomic_int atomic_bool;
+
+static void atomic_store(atomic_int* ptr, LONG val) {
+    InterlockedExchange(ptr, val);
+}
+static LONG atomic_load(atomic_int* ptr) {
+    return InterlockedCompareExchange(ptr, 0, 0);
+}
+static LONG atomic_fetch_add(atomic_int* ptr, LONG inc) {
+    return InterlockedExchangeAdd(ptr, inc);
+}
+static LONG atomic_fetch_sub(atomic_int* ptr, LONG dec) {
+    return atomic_fetch_add(ptr, -(dec));
+}
+
+typedef HANDLE pthread_t;
+
+typedef DWORD thread_ret_t;
+static int pthread_create(pthread_t* out, void* unused, thread_ret_t(*func)(void*), void* arg) {
+    out = CreateThread(NULL, 0, func, arg, 0, NULL);
+    return out != NULL;
+}
+
+static int pthread_join(pthread_t thread, void* unused) {
+    return (int) WaitForSingleObject(thread, INFINITE);
+}
+

whisper.cpp

@@ -2073,6 +2073,8 @@ bool log_mel_spectrogram(
 //
 
 struct whisper_context * whisper_init(const char * path_model) {
+    ggml_time_init();
+
     whisper_context * ctx = new whisper_context;
 
     const int64_t t_start_us = ggml_time_us();
@@ -2260,7 +2262,7 @@ struct whisper_full_params whisper_full_default_params(enum whisper_decode_strat
     switch (strategy) {
         case WHISPER_DECODE_GREEDY:
             {
-                result = (struct whisper_full_params) {
+                result = {
                     .strategy  = WHISPER_DECODE_GREEDY,
                     .n_threads = std::min(4, (int32_t) std::thread::hardware_concurrency()),
                     .offset_ms = 0,
@@ -2281,7 +2283,7 @@ struct whisper_full_params whisper_full_default_params(enum whisper_decode_strat
             } break;
         case WHISPER_DECODE_BEAM_SEARCH:
             {
-                result = (struct whisper_full_params) {
+                result = {
                     .strategy  = WHISPER_DECODE_GREEDY,
                     .n_threads = std::min(4, (int32_t) std::thread::hardware_concurrency()),
                     .offset_ms = 0,