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Commit 99908375 authored by Praveen Chavan's avatar Praveen Chavan Committed by Chien-Yu Chen
Browse files

media: Add a metadata type for native handle from camera 

A payload of type kMetadataBufferTypeNativeHandleSource will
correspond to VideoNativeHandleMetadata which contains a
native_handle_t.

Bug: 26268807
Change-Id: I9805fc74c4b086b65ad57ac06385e12f255ada5b
parent abc47e39

include/media/hardware/HardwareAPI.h

+11 −0
Original line number Diff line number Diff line
@@ -120,6 +120,17 @@ struct VideoNativeMetadata { 
    int nFenceFd;                           // -1 if unused

};



// Meta data buffer layout for passing a native_handle to codec

struct VideoNativeHandleMetadata {

    MetadataBufferType eType;               // must be kMetadataBufferTypeNativeHandleSource



#ifdef OMX_ANDROID_COMPILE_AS_32BIT_ON_64BIT_PLATFORMS

    OMX_PTR pHandle;

#else

    native_handle_t *pHandle;

#endif

};



// A pointer to this struct is passed to OMX_SetParameter() when the extension

// index "OMX.google.android.index.prepareForAdaptivePlayback" is given.

//

include/media/hardware/MetadataBufferType.h

+22 −0
Original line number Diff line number Diff line
@@ -111,6 +111,28 @@ typedef enum { 
     */

    kMetadataBufferTypeANWBuffer = 2,



    /*

     * kMetadataBufferTypeNativeHandleSource is used to indicate that

     * the payload of the metadata buffers can be interpreted as

     * a native_handle_t.

     *

     * In this case, the metadata that the encoder receives

     * will have a byte stream that consists of two parts:

     * 1. First, there is an integer indicating that the metadata contains a

     * native handle (kMetadataBufferTypeNativeHandleSource).

     * 2. This is followed by a pointer to native_handle_t. The encoder needs

     * to interpret this native handle and encode the frame. The encoder must

     * not free this native handle as it does not actually own this native

     * handle. The handle will be freed after the encoder releases the buffer

     * back to camera.

     * ----------------------------------------------------------------

     * |  kMetadataBufferTypeNativeHandleSource | native_handle_t* nh |

     * ----------------------------------------------------------------

     *

     * See the VideoNativeHandleMetadata structure.

     */

    kMetadataBufferTypeNativeHandleSource = 3,



    /* This value is used by framework, but is never used inside a metadata buffer  */

    kMetadataBufferTypeInvalid = -1,