diff --git a/osal/CMakeLists.txt b/osal/CMakeLists.txt
index 40a9096a..9d584911 100644
--- a/osal/CMakeLists.txt
+++ b/osal/CMakeLists.txt
@@ -6,13 +6,13 @@ endif()
 
 if(${ANDROID})
 set(OS_DIR android)
-set(MPP_ALLOCATOR allocator/allocator_ion.c ${DRM_FILES})
+set(MPP_ALLOCATOR allocator/allocator_std.c allocator/allocator_ion.c ${DRM_FILES})
 elseif(${UNIX})
 set(OS_DIR linux)
-set(MPP_ALLOCATOR allocator/allocator_ion.c ${DRM_FILES})
+set(MPP_ALLOCATOR allocator/allocator_std.c allocator/allocator_ion.c ${DRM_FILES})
 elseif(${WIN32})
 set(OS_DIR window)
-set(MPP_ALLOCATOR )
+set(MPP_ALLOCATOR allocator/allocator_std.c)
 else()
 message(SEND_ERROR "Can not found platform definistion ${CMAKE_SYSTEM}")
 endif()
diff --git a/osal/allocator/allocator_drm.c b/osal/allocator/allocator_drm.c
index 0dfd6695..b8d70ef6 100644
--- a/osal/allocator/allocator_drm.c
+++ b/osal/allocator/allocator_drm.c
@@ -360,9 +360,10 @@ MPP_RET os_allocator_drm_close(void *ctx)
 
 os_allocator allocator_drm = {
     os_allocator_drm_open,
+    os_allocator_drm_close,
     os_allocator_drm_alloc,
     os_allocator_drm_free,
     os_allocator_drm_import,
     os_allocator_drm_release,
-    os_allocator_drm_close,
+    NULL,
 };
diff --git a/osal/allocator/allocator_ion.c b/osal/allocator/allocator_ion.c
index 91ccc279..3c343da4 100644
--- a/osal/allocator/allocator_ion.c
+++ b/osal/allocator/allocator_ion.c
@@ -442,10 +442,11 @@ MPP_RET os_allocator_ion_close(void *ctx)
 
 os_allocator allocator_ion = {
     os_allocator_ion_open,
+    os_allocator_ion_close,
     os_allocator_ion_alloc,
     os_allocator_ion_free,
     os_allocator_ion_import,
     os_allocator_ion_release,
-    os_allocator_ion_close,
+    NULL,
 };
 
diff --git a/osal/allocator/allocator_std.c b/osal/allocator/allocator_std.c
new file mode 100644
index 00000000..aed0b82c
--- /dev/null
+++ b/osal/allocator/allocator_std.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2015 Rockchip Electronics Co. LTD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+
+#include "os_mem.h"
+#include "os_allocator.h"
+
+#include "mpp_mem.h"
+#include "mpp_log.h"
+
+typedef struct {
+    size_t alignment;
+    RK_S32 fd_count;
+} allocator_ctx;
+
+MPP_RET allocator_std_open(void **ctx, size_t alignment)
+{
+    MPP_RET ret = MPP_OK;
+    allocator_ctx *p = NULL;
+
+    if (NULL == ctx) {
+        mpp_err_f("do not accept NULL input\n");
+        return MPP_ERR_NULL_PTR;
+    }
+
+    p = mpp_malloc(allocator_ctx, 1);
+    if (NULL == p) {
+        mpp_err_f("failed to allocate context\n");
+        ret = MPP_ERR_MALLOC;
+    } else
+        p->alignment = alignment;
+
+    p->fd_count = 0;
+
+    *ctx = p;
+    return ret;
+}
+
+MPP_RET allocator_std_alloc(void *ctx, MppBufferInfo *info)
+{
+    allocator_ctx *p = NULL;
+
+    if (NULL == ctx) {
+        mpp_err_f("found NULL context input\n");
+        return MPP_ERR_NULL_PTR;
+    }
+
+    p = (allocator_ctx *)ctx;
+    info->fd = p->fd_count++;
+    return (MPP_RET)os_malloc(&info->ptr, p->alignment, info->size);
+}
+
+MPP_RET allocator_std_free(void *ctx, MppBufferInfo *info)
+{
+    (void) ctx;
+    if (info->ptr)
+        os_free(info->ptr);
+    return MPP_OK;
+}
+
+MPP_RET allocator_std_import(void *ctx, MppBufferInfo *info)
+{
+    allocator_ctx *p = (allocator_ctx *)ctx;
+    mpp_assert(ctx);
+    mpp_assert(info->ptr);
+    mpp_assert(info->size);
+    info->hnd   = NULL;
+    info->fd    = p->fd_count++;
+    return MPP_OK;
+}
+
+MPP_RET allocator_std_release(void *ctx, MppBufferInfo *info)
+{
+    (void) ctx;
+    mpp_assert(info->ptr);
+    mpp_assert(info->size);
+    info->ptr   = NULL;
+    info->size  = 0;
+    info->hnd   = NULL;
+    info->fd    = -1;
+    return MPP_OK;
+}
+
+MPP_RET allocator_std_mmap(void *ctx, MppBufferInfo *info)
+{
+    mpp_assert(ctx);
+    mpp_assert(info->ptr);
+    mpp_assert(info->size);
+    return MPP_OK;
+}
+
+MPP_RET allocator_std_close(void *ctx)
+{
+    if (ctx) {
+        mpp_free(ctx);
+        return MPP_OK;
+    }
+    mpp_err_f("found NULL context input\n");
+    return MPP_NOK;
+}
+
+os_allocator allocator_std = {
+    allocator_std_open,
+    allocator_std_close,
+    allocator_std_alloc,
+    allocator_std_free,
+    allocator_std_import,
+    allocator_std_release,
+    allocator_std_mmap,
+};
+
diff --git a/osal/allocator/allocator_std.h b/osal/allocator/allocator_std.h
new file mode 100644
index 00000000..0b427328
--- /dev/null
+++ b/osal/allocator/allocator_std.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2015 Rockchip Electronics Co. LTD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "os_allocator.h"
+
+extern os_allocator allocator_std;
+
diff --git a/osal/android/os_allocator.c b/osal/android/os_allocator.c
index 370a9ec1..c3107765 100644
--- a/osal/android/os_allocator.c
+++ b/osal/android/os_allocator.c
@@ -14,112 +14,10 @@
  * limitations under the License.
  */
 
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-
-#include "os_mem.h"
-#include "os_allocator.h"
+#include "allocator_std.h"
 #include "allocator_ion.h"
 #include "allocator_drm.h"
 
-#include "mpp_mem.h"
-#include "mpp_log.h"
-#include "mpp_common.h"
-
-typedef struct {
-    RK_U32  alignment;
-    RK_S32  fd_count;
-} allocator_ctx_normal;
-
-MPP_RET os_allocator_normal_open(void **ctx, size_t alignment)
-{
-    MPP_RET ret = MPP_OK;
-    allocator_ctx_normal *p = NULL;
-
-    if (NULL == ctx) {
-        mpp_err("os_allocator_open Android do not accept NULL input\n");
-        return MPP_ERR_NULL_PTR;
-    }
-
-    p = mpp_malloc(allocator_ctx_normal, 1);
-    if (NULL == p) {
-        mpp_err("os_allocator_open Android failed to allocate context\n");
-        ret = MPP_ERR_MALLOC;
-    } else
-        p->alignment = alignment;
-
-    p->fd_count = 0;
-
-    *ctx = p;
-    return ret;
-}
-
-MPP_RET os_allocator_normal_alloc(void *ctx, MppBufferInfo *info)
-{
-    allocator_ctx_normal *p = NULL;
-
-    if (NULL == ctx) {
-        mpp_err("os_allocator_close Android do not accept NULL input\n");
-        return MPP_ERR_NULL_PTR;
-    }
-
-    p = (allocator_ctx_normal *)ctx;
-    info->fd = p->fd_count++;
-    return os_malloc(&info->ptr, p->alignment, info->size);
-}
-
-MPP_RET os_allocator_normal_free(void *ctx, MppBufferInfo *info)
-{
-    (void)ctx;
-    if (info->ptr)
-        os_free(info->ptr);
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_normal_import(void *ctx, MppBufferInfo *info)
-{
-    allocator_ctx_normal *p = (allocator_ctx_normal *)ctx;
-    mpp_assert(ctx);
-    mpp_assert(info->ptr);
-    mpp_assert(info->size);
-    info->hnd   = NULL;
-    info->fd    = p->fd_count++;
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_normal_release(void *ctx, MppBufferInfo *info)
-{
-    (void)ctx;
-    mpp_assert(info->ptr);
-    mpp_assert(info->size);
-    info->ptr   = NULL;
-    info->size  = 0;
-    info->hnd   = NULL;
-    info->fd    = -1;
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_normal_close(void *ctx)
-{
-    if (ctx) {
-        mpp_free(ctx);
-        return MPP_OK;
-    }
-    mpp_err("os_allocator_close Linux found NULL context input\n");
-    return MPP_NOK;
-}
-
-static os_allocator allocator_normal = {
-    os_allocator_normal_open,
-    os_allocator_normal_alloc,
-    os_allocator_normal_free,
-    os_allocator_normal_import,
-    os_allocator_normal_release,
-    os_allocator_normal_close,
-};
-
 MPP_RET os_allocator_get(os_allocator *api, MppBufferType type)
 {
     MPP_RET ret = MPP_OK;
@@ -127,7 +25,7 @@ MPP_RET os_allocator_get(os_allocator *api, MppBufferType type)
     switch (type) {
     case MPP_BUFFER_TYPE_NORMAL :
     case MPP_BUFFER_TYPE_V4L2 : {
-        *api = allocator_normal;
+        *api = allocator_std;
     }
     break;
     case MPP_BUFFER_TYPE_ION : {
@@ -138,7 +36,7 @@ MPP_RET os_allocator_get(os_allocator *api, MppBufferType type)
 #ifdef HAVE_DRM
         *api = allocator_drm;
 #else
-        *api = allocator_normal;
+        *api = allocator_std;
 #endif
     }
     break;
diff --git a/osal/linux/os_allocator.c b/osal/linux/os_allocator.c
index 54fbe831..749bfcf9 100644
--- a/osal/linux/os_allocator.c
+++ b/osal/linux/os_allocator.c
@@ -14,145 +14,40 @@
  * limitations under the License.
  */
 
-#include <stdio.h>
-
-#include "os_mem.h"
-#include "os_allocator.h"
+#include "mpp_log.h"
 
+#include "allocator_std.h"
 #include "allocator_drm.h"
 #include "allocator_ion.h"
 
-#include "mpp_mem.h"
-#include "mpp_log.h"
-
 /*
  * Linux only support MPP_BUFFER_TYPE_NORMAL so far
  * we can support MPP_BUFFER_TYPE_V4L2 later
  */
-typedef struct {
-    size_t          alignment;
-    RK_S32          fd_count;
-} allocator_ctx;
-
-MPP_RET os_allocator_normal_open(void **ctx, size_t alignment)
-{
-    MPP_RET ret = MPP_OK;
-    allocator_ctx *p = NULL;
-
-    if (NULL == ctx) {
-        mpp_err("os_allocator_open Linux do not accept NULL input\n");
-        return MPP_ERR_NULL_PTR;
-    }
-
-    p = mpp_malloc(allocator_ctx, 1);
-    if (NULL == p) {
-        mpp_err("os_allocator_open Linux failed to allocate context\n");
-        ret = MPP_ERR_MALLOC;
-    } else
-        p->alignment = alignment;
-
-    p->fd_count = 0;
-
-    *ctx = p;
-    return ret;
-}
-
-MPP_RET os_allocator_normal_alloc(void *ctx, MppBufferInfo *info)
-{
-    allocator_ctx *p = NULL;
-
-    if (NULL == ctx) {
-        mpp_err("os_allocator_alloc Linux found NULL context input\n");
-        return MPP_ERR_NULL_PTR;
-    }
-
-    p = (allocator_ctx *)ctx;
-    info->fd = p->fd_count++;
-    return os_malloc(&info->ptr, p->alignment, info->size);
-}
-
-MPP_RET os_allocator_normal_free(void *ctx, MppBufferInfo *info)
-{
-    (void) ctx;
-    if (info->ptr)
-        os_free(info->ptr);
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_normal_import(void *ctx, MppBufferInfo *info)
-{
-    allocator_ctx *p = (allocator_ctx *)ctx;
-    mpp_assert(ctx);
-    mpp_assert(info->ptr);
-    mpp_assert(info->size);
-    info->hnd   = NULL;
-    info->fd    = p->fd_count++;
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_normal_release(void *ctx, MppBufferInfo *info)
-{
-    (void) ctx;
-    mpp_assert(info->ptr);
-    mpp_assert(info->size);
-    info->ptr   = NULL;
-    info->size  = 0;
-    info->hnd   = NULL;
-    info->fd    = -1;
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_normal_close(void *ctx)
-{
-    if (ctx) {
-        mpp_free(ctx);
-        return MPP_OK;
-    }
-    mpp_err("os_allocator_close Linux found NULL context input\n");
-    return MPP_NOK;
-}
-
-static os_allocator allocator_normal = {
-    os_allocator_normal_open,
-    os_allocator_normal_alloc,
-    os_allocator_normal_free,
-    os_allocator_normal_import,
-    os_allocator_normal_release,
-    os_allocator_normal_close,
-};
-
-static os_allocator allocator_v4l2 = {
-    os_allocator_normal_open,
-    os_allocator_normal_alloc,
-    os_allocator_normal_free,
-    os_allocator_normal_import,
-    os_allocator_normal_release,
-    os_allocator_normal_close,
-};
 
 MPP_RET os_allocator_get(os_allocator *api, MppBufferType type)
 {
     MPP_RET ret = MPP_OK;
     switch (type) {
     case MPP_BUFFER_TYPE_NORMAL : {
-        *api = allocator_normal;
+        *api = allocator_std;
     } break;
     case MPP_BUFFER_TYPE_ION : {
 #ifdef RKPLATFORM
         *api = allocator_ion;
 #else
-        *api = allocator_normal;
+        *api = allocator_std;
 #endif
     } break;
     case MPP_BUFFER_TYPE_V4L2 : {
         mpp_err("os_allocator_get Linux MPP_BUFFER_TYPE_V4L2 do not implement yet\n");
-        *api = allocator_v4l2;
+        *api = allocator_std;
     } break;
     case MPP_BUFFER_TYPE_DRM : {
 #ifdef HAVE_DRM
         *api = allocator_drm;
 #else
-        *api = allocator_normal;
+        *api = allocator_std;
 #endif
     } break;
     default : {
diff --git a/osal/mpp_allocator.cpp b/osal/mpp_allocator.cpp
index 8eed8337..2e91e1d2 100644
--- a/osal/mpp_allocator.cpp
+++ b/osal/mpp_allocator.cpp
@@ -26,78 +26,80 @@
 #define MPP_ALLOCATOR_LOCK(p)   pthread_mutex_lock(&(p)->lock);
 #define MPP_ALLOCATOR_UNLOCK(p) pthread_mutex_unlock(&(p)->lock);
 
-MPP_RET mpp_allocator_alloc(MppAllocator allocator, MppBufferInfo *info)
+typedef enum OsAllocatorApiId_e {
+    ALLOC_API_ALLOC,
+    ALLOC_API_FREE,
+    ALLOC_API_IMPORT,
+    ALLOC_API_RELEASE,
+    ALLOC_API_MMAP,
+    ALLOC_API_BUTT,
+} OsAllocatorApiId;
+
+static MPP_RET mpp_allocator_api_wrapper(MppAllocator allocator, MppBufferInfo *info, OsAllocatorApiId id)
 {
-    if (NULL == allocator || NULL == info) {
-        mpp_err_f("invalid input: allocator %p info %p\n",
-                  allocator, info);
+    if (NULL == allocator || NULL == info || id >= ALLOC_API_BUTT) {
+        mpp_err_f("invalid input: allocator %p info %p id %d\n",
+                  allocator, info, id);
         return MPP_ERR_UNKNOW;
     }
 
     MPP_RET ret = MPP_NOK;
     MppAllocatorImpl *p = (MppAllocatorImpl *)allocator;
+    OsAllocatorFunc func;
+
     MPP_ALLOCATOR_LOCK(p);
-    if (p->os_api.alloc && p->ctx)
-        ret = p->os_api.alloc(p->ctx, info);
+    switch (id) {
+    case ALLOC_API_ALLOC : {
+        func = p->os_api.alloc;
+    } break;
+    case ALLOC_API_FREE : {
+        func = p->os_api.free;
+    } break;
+    case ALLOC_API_IMPORT : {
+        func = p->os_api.import;
+    } break;
+    case ALLOC_API_RELEASE : {
+        func = p->os_api.release;
+    } break;
+    case ALLOC_API_MMAP : {
+        func = p->os_api.mmap;
+    } break;
+    default : {
+        func = NULL;
+    } break;
+    }
+
+    if (func && p->ctx)
+        ret = func(p->ctx, info);
+
     MPP_ALLOCATOR_UNLOCK(p);
 
     return ret;
 }
 
+MPP_RET mpp_allocator_alloc(MppAllocator allocator, MppBufferInfo *info)
+{
+    return mpp_allocator_api_wrapper(allocator, info, ALLOC_API_ALLOC);
+}
+
 MPP_RET mpp_allocator_free(MppAllocator allocator, MppBufferInfo *info)
 {
-    if (NULL == allocator || NULL == info) {
-        mpp_err_f("invalid input: allocator %p info %p\n",
-                  allocator, info);
-        return MPP_ERR_UNKNOW;
-    }
-
-    MPP_RET ret = MPP_NOK;
-    MppAllocatorImpl *p = (MppAllocatorImpl *)allocator;
-    MPP_ALLOCATOR_LOCK(p);
-    if (p->os_api.free && p->ctx)
-        ret = p->os_api.free(p->ctx, info);
-    MPP_ALLOCATOR_UNLOCK(p);
-
-    return ret;
+    return mpp_allocator_api_wrapper(allocator, info, ALLOC_API_FREE);
 }
 
 MPP_RET mpp_allocator_import(MppAllocator allocator, MppBufferInfo *info)
 {
-    if (NULL == info) {
-        mpp_err_f("invalid input: info %p\n", info);
-        return MPP_ERR_UNKNOW;
-    }
-
-    MPP_RET ret = MPP_NOK;
-    MppAllocatorImpl *p = (MppAllocatorImpl *)allocator;
-    MPP_ALLOCATOR_LOCK(p);
-    if (p->os_api.import && p->ctx) {
-        ret = p->os_api.import(p->ctx, info);
-    }
-    MPP_ALLOCATOR_UNLOCK(p);
-
-    return ret;
+    return mpp_allocator_api_wrapper(allocator, info, ALLOC_API_IMPORT);
 }
 
-
 MPP_RET mpp_allocator_release(MppAllocator allocator, MppBufferInfo *info)
 {
-    if (NULL == allocator || NULL == info) {
-        mpp_err_f("invalid input: allocator %p info %p\n",
-                  allocator, info);
-        return MPP_ERR_UNKNOW;
-    }
+    return mpp_allocator_api_wrapper(allocator, info, ALLOC_API_RELEASE);
+}
 
-    MPP_RET ret = MPP_NOK;
-    MppAllocatorImpl *p = (MppAllocatorImpl *)allocator;
-    MPP_ALLOCATOR_LOCK(p);
-    if (p->os_api.release && p->ctx) {
-        ret = p->os_api.release(p->ctx, info);
-    }
-    MPP_ALLOCATOR_UNLOCK(p);
-
-    return ret;
+MPP_RET mpp_allocator_mmap(MppAllocator allocator, MppBufferInfo *info)
+{
+    return mpp_allocator_api_wrapper(allocator, info, ALLOC_API_MMAP);
 }
 
 static MppAllocatorApi mpp_allocator_api = {
@@ -107,7 +109,7 @@ static MppAllocatorApi mpp_allocator_api = {
     mpp_allocator_free,
     mpp_allocator_import,
     mpp_allocator_release,
-    NULL,
+    mpp_allocator_mmap,
 };
 
 MPP_RET mpp_allocator_get(MppAllocator *allocator, MppAllocatorApi **api, MppBufferType type)
diff --git a/osal/os_allocator.h b/osal/os_allocator.h
index 71989ab0..b349f008 100644
--- a/osal/os_allocator.h
+++ b/osal/os_allocator.h
@@ -19,13 +19,17 @@
 
 #include "mpp_allocator.h"
 
+typedef MPP_RET (*OsAllocatorFunc)(void *ctx, MppBufferInfo *info);
+
 typedef struct os_allocator_t {
     MPP_RET (*open)(void **ctx, size_t alignment);
-    MPP_RET (*alloc)(void *ctx, MppBufferInfo *info);
-    MPP_RET (*free)(void *ctx, MppBufferInfo *info);
-    MPP_RET (*import)(void *ctx, MppBufferInfo *info);
-    MPP_RET (*release)(void *ctx, MppBufferInfo *info);
     MPP_RET (*close)(void *ctx);
+
+    OsAllocatorFunc alloc;
+    OsAllocatorFunc free;
+    OsAllocatorFunc import;
+    OsAllocatorFunc release;
+    OsAllocatorFunc mmap;
 } os_allocator;
 
 #ifdef __cplusplus
diff --git a/osal/window/os_allocator.c b/osal/window/os_allocator.c
index 2a661978..64c69045 100644
--- a/osal/window/os_allocator.c
+++ b/osal/window/os_allocator.c
@@ -14,108 +14,13 @@
  * limitations under the License.
  */
 
-#include "os_mem.h"
 #include "os_allocator.h"
-
-#include "mpp_mem.h"
-#include "mpp_log.h"
+#include "allocator_std.h"
 
 /*
  * window only support MPP_BUFFER_TYPE_NORMAL
  */
 
-typedef struct {
-    size_t alignment;
-    RK_S32 fd_count;
-} allocator_ctx;
-
-MPP_RET os_allocator_open(void **ctx, size_t alignment)
-{
-    MPP_RET ret = MPP_OK;
-    allocator_ctx *p = NULL;
-
-    if (NULL == ctx) {
-        mpp_err("os_allocator_open Window do not accept NULL input\n");
-        return MPP_ERR_NULL_PTR;
-    }
-
-    p = mpp_malloc(allocator_ctx, 1);
-    if (NULL == p) {
-        mpp_err("os_allocator_open Window failed to allocate context\n");
-        ret = MPP_ERR_MALLOC;
-    } else
-        p->alignment = alignment;
-
-    p->fd_count = 0;
-
-    *ctx = p;
-    return ret;
-}
-
-MPP_RET os_allocator_alloc(void *ctx, MppBufferInfo *info)
-{
-    allocator_ctx *p = NULL;
-
-    if (NULL == ctx) {
-        mpp_err("os_allocator_alloc Window found NULL context input\n");
-        return MPP_ERR_NULL_PTR;
-    }
-
-    p = (allocator_ctx *)ctx;
-    info->fd = p->fd_count++;
-    return (MPP_RET)os_malloc(&info->ptr, p->alignment, info->size);
-}
-
-MPP_RET os_allocator_free(void *ctx, MppBufferInfo *info)
-{
-    (void) ctx;
-    if (info->ptr)
-        os_free(info->ptr);
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_import(void *ctx, MppBufferInfo *info)
-{
-    allocator_ctx *p = (allocator_ctx *)ctx;
-    mpp_assert(ctx);
-    mpp_assert(info->ptr);
-    mpp_assert(info->size);
-    info->hnd   = NULL;
-    info->fd    = p->fd_count++;
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_release(void *ctx, MppBufferInfo *info)
-{
-    (void) ctx;
-    mpp_assert(info->ptr);
-    mpp_assert(info->size);
-    info->ptr   = NULL;
-    info->size  = 0;
-    info->hnd   = NULL;
-    info->fd    = -1;
-    return MPP_OK;
-}
-
-MPP_RET os_allocator_close(void *ctx)
-{
-    if (ctx) {
-        mpp_free(ctx);
-        return MPP_OK;
-    }
-    mpp_err("os_allocator_close Window found NULL context input\n");
-    return MPP_NOK;
-}
-
-static os_allocator allocator_window = {
-    os_allocator_open,
-    os_allocator_alloc,
-    os_allocator_free,
-    os_allocator_import,
-    os_allocator_release,
-    os_allocator_close,
-};
-
 MPP_RET os_allocator_get(os_allocator *api, MppBufferType type)
 {
     MPP_RET ret = MPP_OK;
@@ -123,7 +28,7 @@ MPP_RET os_allocator_get(os_allocator *api, MppBufferType type)
     case MPP_BUFFER_TYPE_NORMAL :
     case MPP_BUFFER_TYPE_ION :
     case MPP_BUFFER_TYPE_V4L2 : {
-        *api = allocator_window;
+        *api = allocator_std;
     } break;
     default : {
         ret = MPP_NOK;