[mpp_buffer]: Add offset property

1. Add offset set / get function to MppBuffer
2. Add U32 register address converstion function.

Change-Id: Id297b7a05e47d4e249f5e33c1924a0539729c808
Signed-off-by: Herman Chen <herman.chen@rock-chips.com>

inc/mpp_buffer.h

@@ -251,6 +251,12 @@ typedef struct MppBufferInfo_t {
 #define mpp_buffer_set_index(buffer, index) \
         mpp_buffer_set_index_with_caller(buffer, index, __FUNCTION__)
 
+#define mpp_buffer_get_offset(buffer) \
+        mpp_buffer_get_offset_with_caller(buffer, __FUNCTION__)
+
+#define mpp_buffer_set_offset(buffer, offset) \
+        mpp_buffer_set_offset_with_caller(buffer, offset, __FUNCTION__)
+
 #define mpp_buffer_group_get_internal(group, type, ...) \
         mpp_buffer_group_get(group, type, MPP_BUFFER_INTERNAL, MODULE_TAG, __FUNCTION__)
 
@@ -285,6 +291,8 @@ int     mpp_buffer_get_fd_with_caller(MppBuffer buffer, const char *caller);
 size_t  mpp_buffer_get_size_with_caller(MppBuffer buffer, const char *caller);
 int     mpp_buffer_get_index_with_caller(MppBuffer buffer, const char *caller);
 MPP_RET mpp_buffer_set_index_with_caller(MppBuffer buffer, int index, const char *caller);
+size_t  mpp_buffer_get_offset_with_caller(MppBuffer buffer, const char *caller);
+MPP_RET mpp_buffer_set_offset_with_caller(MppBuffer buffer, size_t offset, const char *caller);
 
 MPP_RET mpp_buffer_group_get(MppBufferGroup *group, MppBufferType type, MppBufferMode mode,
                              const char *tag, const char *caller);

mpp/base/inc/mpp_buffer_impl.h

@@ -49,6 +49,7 @@ struct MppBufferImpl_t {
     MppBufferMode       mode;
 
     MppBufferInfo       info;
+    size_t              offset;
 
     /* used for buf on group reset mode
        set disard value to 1 when frame refcount no zero ,
@@ -143,6 +144,7 @@ MPP_RET mpp_buffer_mmap(MppBufferImpl *buffer, const char* caller);
 MPP_RET mpp_buffer_ref_inc(MppBufferImpl *buffer, const char* caller);
 MPP_RET mpp_buffer_ref_dec(MppBufferImpl *buffer, const char* caller);
 MppBufferImpl *mpp_buffer_get_unused(MppBufferGroupImpl *p, size_t size);
+RK_U32  mpp_buffer_to_addr(MppBuffer buffer, size_t offset);
 
 MPP_RET mpp_buffer_group_init(MppBufferGroupImpl **group, const char *tag, const char *caller, MppBufferMode mode, MppBufferType type);
 MPP_RET mpp_buffer_group_deinit(MppBufferGroupImpl *p);

mpp/base/mpp_buffer.cpp

@@ -235,6 +235,30 @@ MPP_RET mpp_buffer_set_index_with_caller(MppBuffer buffer, int index,
     return MPP_OK;
 }
 
+size_t  mpp_buffer_get_offset_with_caller(MppBuffer buffer, const char *caller)
+{
+    if (NULL == buffer) {
+        mpp_err_f("invalid NULL input\n");
+        return -1;
+    }
+
+    MppBufferImpl *p = (MppBufferImpl*)buffer;
+    (void)caller;
+    return p->offset;
+}
+
+MPP_RET mpp_buffer_set_offset_with_caller(MppBuffer buffer, size_t offset, const char *caller)
+{
+    if (NULL == buffer) {
+        mpp_err_f("invalid NULL input\n");
+        return MPP_ERR_UNKNOW;
+    }
+
+    MppBufferImpl *p = (MppBufferImpl*)buffer;
+    p->offset = offset;
+    (void)caller;
+    return MPP_OK;
+}
 
 MPP_RET mpp_buffer_info_get_with_caller(MppBuffer buffer, MppBufferInfo *info, const char *caller)
 {

mpp/base/mpp_buffer_impl.cpp

@@ -446,6 +446,30 @@ MppBufferImpl *mpp_buffer_get_unused(MppBufferGroupImpl *p, size_t size)
     return buffer;
 }
 
+RK_U32 mpp_buffer_to_addr(MppBuffer buffer, size_t offset)
+{
+    MppBufferImpl *impl = (MppBufferImpl *)buffer;
+
+    if (NULL == impl) {
+        mpp_err_f("NULL buffer convert to zero address\n");
+        return 0;
+    }
+
+    if (impl->info.fd >= (1 << 10)) {
+        mpp_err_f("buffer fd %d is too large\n");
+        return 0;
+    }
+
+    if (impl->offset + offset >= SZ_4M) {
+        mpp_err_f("offset %d + %d is larger than 4M use extra info to send offset\n");
+        return 0;
+    }
+
+    RK_U32 addr = impl->info.fd + ((impl->offset + offset) << 10);
+
+    return addr;
+}
+
 MPP_RET mpp_buffer_group_init(MppBufferGroupImpl **group, const char *tag, const char *caller,
                               MppBufferMode mode, MppBufferType type)
 {