diff --git a/multimedia/av_codec/native_avcodec_base.h b/multimedia/av_codec/native_avcodec_base.h
index b26dc2454..d084e00ba 100644
--- a/multimedia/av_codec/native_avcodec_base.h
+++ b/multimedia/av_codec/native_avcodec_base.h
@@ -150,6 +150,37 @@ typedef struct OH_AVCodecCallback {
     OH_AVCodecOnNewOutputBuffer onNewOutputBuffer;
 } OH_AVCodecCallback;
 
+/**
+ * @brief The function pointer will be called to get sequenced media data.
+ * @syscap SystemCapability.Multimedia.Media.CodecBase
+ * @param data The buffer to fill.
+ * @param length Length of data to read.
+ * @param offset Start offset to read.
+ * @return Actual length of data read to the buffer.
+ * @since 12
+*/
+typedef int32_t (*OH_AVDataSourceReadAt)(OH_AVBuffer *data, int32_t length, int64_t offset);
+
+/**
+ * @brief User customized data source.
+ * @syscap SystemCapability.Multimedia.Media.CodecBase
+ * @since 12
+*/
+typedef struct OH_AVDataSource {
+    /**
+     * @brief Total size of the data source.
+     * @syscap SystemCapability.Multimedia.Media.CodecBase
+     * @since 12
+     */
+    int64_t size;
+    /**
+     * @brief Data callback of the data source.
+     * @syscap SystemCapability.Multimedia.Media.CodecBase
+     * @since 12
+     */
+    OH_AVDataSourceReadAt readAt;
+} OH_AVDataSource;
+
 /**
  * @brief Enumerates the MIME types of audio and video codecs
  * @syscap SystemCapability.Multimedia.Media.CodecBase
diff --git a/multimedia/av_codec/native_avsource.h b/multimedia/av_codec/native_avsource.h
index 5a9e71e0c..a8dca0837 100644
--- a/multimedia/av_codec/native_avsource.h
+++ b/multimedia/av_codec/native_avsource.h
@@ -27,6 +27,15 @@ extern "C" {
 
 typedef struct OH_AVSource OH_AVSource;
 
+/**
+ * @brief Creates an OH_AVSource instance that models the media with data source.
+ * @syscap SystemCapability.Multimedia.Media.Spliter
+ * @param dataSource User customized media resource.
+ * @return Returns a pointer to an OH_AVSource instance
+ * @since 12
+*/
+OH_AVSource *OH_AVSource_CreateWithDataSource(OH_AVDataSource *dataSource);
+
 /**
  * @brief Creates an OH_AVSource instance that models the media at the URI.
  * @syscap SystemCapability.Multimedia.Media.Spliter