Hi Ravi, Thank you very much for your quick reply. I have few more specific questions, *1. *Let me explain my requirements. I want to use my own mp3 decoder algorithm which has the conditions that input and output buffers should always be available in a predefined memory area. For which I need to write an OMX component and need to integrate the same in OpenCORE framework. Which means I need to inform the mp3 OpenCORE node that my OMX component is going to allocate the buffers. Now as explained by you the mp3 node will do a GetParam for "PV_OMX_COMPONENT_CAPABILITY_TYPE_INDEX". In my OMX component if i set PV capabilities (iOMXComponentSupportsExternalInputBufferAlloc and iOMXComponentSupportsExternalOutputBufferAlloc) to false then is this the correct way of informing the node that my OMX component is going to allocate both input and output buffers?
*2*. If my OMX component is allocating the buffers then how do i inform the previous node ( in our case it is Source node i.e. mp3 parser node) that use the input buffers allocated by my OMX component and do not allocate your own buffers? I hope I am clear with my questions. Thanks again. ~ On Thu, Dec 25, 2008 at 12:33 PM, rktb <[email protected]> wrote: > > 1. Source node has an output port. Decoder nodes, when present, have > both input and output ports. Sink node has an input port. Depending on > the datapath configuration, there are two possibilities: > (i) SourceOutPort--->DecInPort~~DecoderNode~~DecOutPort--->SinkInPort > (ii) SourceOutPort--->SinkInPort > > The way these nodes are connected can be seen at engines/player/src/ > pv_player_datapath.cpp. > > The header files pvmi/pvmf/include/pvmf_port_interface.h and pvmi/pvmf/ > include/pvmf_port_base_impl.h show you the port interface and describe > in brief the APIs used. Please refer these along with the nodes to see > how data is passed through. Please post any specific questions you > might have. > > 2. Are you using a new decoder node for mp3 that interacts with your > OMX component or are you using the existing node? If so, I need more > information on your implementation. For the existing OMX audio decoder > node, we have the capability of querying the OMX components whether or > not they want to allocate their own buffers. This is done by calling > OMX_GetParameter() with a PV proprietary index > "PV_OMX_COMPONENT_CAPABILITY_TYPE_INDEX". Please refer the > openmax_call_sequences.pdf for the list of capabilities that can be > queried. We currently cannot pass buffers from the decoder node to the > source node. So, the parser node sends the data to the decoder node in > its own buffers, and in case the OMX component is adamant that it > wants to allocate it's own input buffer, then the contents of the > buffer from the source node is copied into the buffer provided by the > OMX component in the decoder node. > > Here is some more information that was earlier provided: > > http://groups.google.com/group/android-framework/browse_thread/thread/eb0401934b052bcf/6cb18de0b9793620?hl=en#6cb18de0b9793620 > > -Ravi > > On Dec 25, 9:41 am, MMF <[email protected]> wrote: > > Hi All, > > > > I have some doubts regarding OpenCORE, > > > > *1. *Can someone please explain me how the ports actually send and > receive > > the buffers in a pipeline in OpenCORE. > > For example in mp3 pipeline I may have a parser node, a decoder node and > > render node. > > How these 3 nodes actually setup the connection with each other and how > the > > data flows( input and output buffers) flow through them. > > > > *2.* If my mp3 decoder node is using a OpenMAX component then in the > current > > source code input and output buffers are allocated by OpenCORE node and > they > > have been communicated to OpenMAX component by calling UseBuffers(). But > if > > I want my OpenMAX to allocate the input and output buffers then how to do > > that? Are there any setting of parameters by which I can convey the > OpenCORE > > node that my underlying OpenMAX component will allocate the buffers. > Because > > I guess the input buffers are comming to mp3 node from parser node so do > I > > need to make the modification in the parser node also? > > > > Thanks in advance > > ~ > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "android-framework" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-framework?hl=en -~----------~----~----~----~------~----~------~--~---
