From 7969fde3bcdfe979cb9f3a308510f638b2831605 Mon Sep 17 00:00:00 2001
From: rsp4jack <rsp4jack@outlook.com>
Date: Sat, 2 Nov 2024 21:41:13 +0800
Subject: [PATCH] Fix compatibility with the old interface

---
 arm-wt-22k/src/hostmm_ng.c | 53 +++++++++++++++++++++++++++++++++++++-
 example/sonivoxrender.c    | 11 +++++---
 2 files changed, 59 insertions(+), 5 deletions(-)

diff --git a/arm-wt-22k/src/hostmm_ng.c b/arm-wt-22k/src/hostmm_ng.c
index 5ac999a1..82824a87 100644
--- a/arm-wt-22k/src/hostmm_ng.c
+++ b/arm-wt-22k/src/hostmm_ng.c
@@ -53,8 +53,13 @@ static const union {
 // --- end
 
 typedef struct eas_hw_file_tag {
-    FILE* handle;
+    void* handle;
     EAS_BOOL own;
+
+    // legacy interface for compatibility
+    int pos;
+    int (*readAt)(void *handle, void *buf, int offset, int size);
+    int (*size)(void *handle);
 } EAS_HW_FILE;
 
 EAS_RESULT EAS_HWInit(EAS_HW_DATA_HANDLE* pHWInstData)
@@ -100,6 +105,8 @@ EAS_RESULT EAS_HWOpenFile(EAS_HW_DATA_HANDLE hwInstData, EAS_FILE_LOCATOR locato
     *pFile = malloc(sizeof(EAS_HW_FILE));
     (*pFile)->handle = locator->handle;
     (*pFile)->own = EAS_FALSE;
+    (*pFile)->readAt = locator->readAt;
+    (*pFile)->size = locator->size;
     return EAS_SUCCESS;
 }
 
@@ -110,6 +117,18 @@ EAS_RESULT EAS_HWReadFile(EAS_HW_DATA_HANDLE hwInstData, EAS_FILE_HANDLE file, v
         return EAS_ERROR_INVALID_HANDLE;
     }
 
+    if (file->readAt != NULL) {
+        int count = file->readAt(file->handle, pBuffer, file->pos, n);
+        file->pos += count;
+        if (pBytesRead != NULL) {
+            *pBytesRead = count;
+        }
+        if (count < n) {
+            return EAS_EOF;
+        }
+        return EAS_SUCCESS;
+    }
+
     size_t count = fread(pBuffer, 1, n, file->handle);
     if (pBytesRead != NULL) {
         *pBytesRead = count;
@@ -172,6 +191,13 @@ EAS_RESULT EAS_HWFilePos(EAS_HW_DATA_HANDLE hwInstData, EAS_FILE_HANDLE file, EA
         return EAS_ERROR_INVALID_HANDLE;
     }
 
+    if (file->readAt != NULL) {
+        if (pPosition != NULL) {
+            *pPosition = file->pos;
+        }
+        return EAS_SUCCESS;
+    }
+
     long pos = ftell(file->handle);
     if (pPosition != NULL) {
         *pPosition = pos;
@@ -186,6 +212,11 @@ EAS_RESULT EAS_HWFileSeek(EAS_HW_DATA_HANDLE hwInstData, EAS_FILE_HANDLE file, E
         return EAS_ERROR_INVALID_HANDLE;
     }
 
+    if (file->readAt != NULL) {
+        file->pos = position;
+        return EAS_SUCCESS;
+    }
+
     /* validate new position */
     if (fseek(file->handle, position, SEEK_SET) != 0) {
         return EAS_ERROR_FILE_SEEK;
@@ -201,6 +232,11 @@ EAS_RESULT EAS_HWFileSeekOfs(EAS_HW_DATA_HANDLE hwInstData, EAS_FILE_HANDLE file
         return EAS_ERROR_INVALID_HANDLE;
     }
 
+    if (file->readAt != NULL) {
+        file->pos = position;
+        return EAS_SUCCESS;
+    }
+
     if (fseek(file->handle, position, SEEK_CUR) != 0) {
         return EAS_ERROR_FILE_SEEK;
     }
@@ -211,6 +247,17 @@ EAS_RESULT EAS_HWFileSeekOfs(EAS_HW_DATA_HANDLE hwInstData, EAS_FILE_HANDLE file
 EAS_RESULT EAS_HWDupHandle(EAS_HW_DATA_HANDLE hwInstData, EAS_FILE_HANDLE file, EAS_FILE_HANDLE* pDupFile)
 {
     *pDupFile = NULL;
+
+    if (file->readAt != NULL) {
+        *pDupFile = malloc(sizeof(EAS_HW_FILE));
+        (*pDupFile)->handle = file->handle;
+        (*pDupFile)->own = EAS_FALSE;
+        (*pDupFile)->readAt = file->readAt;
+        (*pDupFile)->size = file->size;
+        (*pDupFile)->pos = file->pos;
+        return EAS_SUCCESS;
+    }
+
 #if defined(__linux__) // todo: implement for other platforms
     char filePath[PATH_MAX];
     char linkPath[PATH_MAX];
@@ -292,6 +339,10 @@ EAS_RESULT EAS_HWCloseFile(EAS_HW_DATA_HANDLE hwInstData, EAS_FILE_HANDLE file)
         return EAS_ERROR_INVALID_HANDLE;
     }
 
+    if (file->readAt != NULL) {
+        return EAS_SUCCESS;
+    }
+
     if (file->own) {
         if (fclose(file->handle) != 0) {
             return EAS_ERROR_INVALID_HANDLE;
diff --git a/example/sonivoxrender.c b/example/sonivoxrender.c
index 6f53b343..e50a040e 100644
--- a/example/sonivoxrender.c
+++ b/example/sonivoxrender.c
@@ -106,6 +106,7 @@ int initializeLibrary(void)
 
     if (dls_path != NULL) {
         EAS_FILE mDLSFile;
+        memset(&mDLSFile, 0, sizeof(EAS_FILE));
 
         mDLSFile.handle = fopen(dls_path, "rb");
         if (mDLSFile.handle == NULL) {
@@ -114,8 +115,8 @@ int initializeLibrary(void)
             goto cleanup;
         }
 
-        mDLSFile.readAt = Read;
-        mDLSFile.size = Size;
+        // mDLSFile.readAt = Read;
+        // mDLSFile.size = Size;
 
         result = EAS_LoadDLSCollection(mEASDataHandle, NULL, &mDLSFile);
         fclose(mDLSFile.handle);
@@ -210,6 +211,8 @@ int renderFile(const char *fileName)
 
     int ok = EXIT_SUCCESS;
 
+    memset(&mEasFile, 0, sizeof(EAS_FILE));
+
     mEasFile.handle = fopen(fileName, "rb");
     if (mEasFile.handle == NULL) {
         fprintf(stderr, "Failed to open %s. error: %s\n", fileName, strerror(errno));
@@ -217,8 +220,8 @@ int renderFile(const char *fileName)
         return ok;
     }
 
-    mEasFile.readAt = Read;
-    mEasFile.size = Size;
+    // mEasFile.readAt = Read;
+    // mEasFile.size = Size;
 
     EAS_RESULT result = EAS_OpenFile(mEASDataHandle, &mEasFile, &mEASStreamHandle);
     if (result != EAS_SUCCESS) {