GST-OpenMax and GST-Ducati differences.

Hi,

gst-ducati is for GLP releases and not for ICS. For ICS we use only OpenMax components for multimedia.

Regards, Satheesh

hello Dear, Satheesh:

Thanks for reply.

 In stagefright,  graphicbuffer (inherited from NativeWindowBuffer)  is used for for OpenMax output port,

OMXNodeInstance::useGraphicBuffer2_l   

err = OMX_UseBuffer(
            mHandle,
            &header,
            portIndex,
            bufferMeta, ===> is this field must be graphicbuffer type?
            def.nBufferSize,
            bufferHandle);

In my project ( Gstreamer , ICS on OMAP 4430 ), we want to use gst-openmax, GstBuffer is set here, but OMX blocked when received "OMX_EventPortSettingsChanged"

Do you have some comments?

Thanks in advance.

Br,

Ning.

Hi,

It is not required to be graphic buffer type. This field is meant for application specific private data.

Can you provide us more findings where exactly the OpenMax/GStreamer hangs when it received OMX_EventPortSettingsChanged? The current information not enough to provide any comment as such.

Regards,

Chintan

Hello Chintan:

Thanks for reply.

 in gst-openmax, following steps are performed:

       1) OMX_IndexParamVideoPortFormat, Get/Set both Input port and output port; 

        2) OMX_IndexParamPortDefinition, 

            for Input port, correct nFrameWidth, nFrameHeight, eCompressionFormat, eColorFormat, and nBufferSize=64K

            for output port, correct nFrameWidth, nFrameHeight,xFramerate

         3) native_window_set_crop/ native_window_set_buffer_layout

          4) enableGraphic buffer

          5) Allocate buffer:

             Input port, OMX_AllocateBuffer

             Output port,  Set up the native window(scaling mode, geometry, usage...),  

                                nativewindow->dequeueBuffer, then OMX_UseBuffer

          6) EmptyBuffer/FillBuffer

          7) OMX_EventPortSettingsChanged, received and send port disable command blocked...

              >>>>  1) - 6) configurations return no error, and buffer data is also correct compared with stagefright... 

              >>>> It is strange that first frame decoded, once event OMX_EventPortSettingsChanged, all A9 and ducati communications fails including getparam...

              ducati trace and gstreamer traces are uploaded here.

             http://www.ziddu.com/download/19599291/ducati_gstreamer.zip.html

              Dynamic port reconfiguration triggered since small o/p buffer size provided in first frame decode

Ning,

Thanks for sharing the feedback. It is really useful.

Regards,

Chintan