Function FREMediaBufferLock 

pub unsafe extern "C" fn FREMediaBufferLock(
    ctx: FREContext,
    mediaBuffer: FREObject,
    pData: *mut FREBytes,
    pWidth: *mut uint32_t,
    pHeight: *mut uint32_t,
    pStride: *mut uint32_t,
    pFormat: *mut uint32_t,
) -> FREResult

Locks a MediaBuffer bitmap and returns information about the data storage.

Note that for every call to FREMediaBufferLock, a corresponding call to FREMediaBufferUnlock must be made. Ideally this would be as swift as possible, as locking a media buffer would impact rendering of any bitmap it contains. The unlock must be called prior to returning from the ANE function call though.

@param ctx The FREContext for the native extension instance. @param mediaBuffer The AS3 MediaBuffer object for which the image data is requested. @param pData Pointer to a byte pointer that will be set to the internal image data. @param pWidth Pointer to a value that will be set to the width of the image data. @param pHeight Pointer to a value that will be set to the height of the image data. @param pStride Pointer to a value that will be set to the stride i.e. number of bytes between the start of each row on the image. @param pFormat Pointer to a value that will be set to a format value (for future usage: currently images are ARGB format).

@returns FREResult::FRE_OK FREResult::FRE_INVALID_ARGUMENT if any parameter is null FREResult::FRE_INVALID_OBJECT if the MediaBuffer objects has an incorrect type FREResult::FRE_WRONG_THREAD if called from the wrong thread; at some point this function will be updated to allow multi-thread calling