Directx media object example
The first of the two output streams delivers compressed megaman x5 rom psx samples; the other provides uncompressed samples.
First of all, we are adding GetObjectFriendlyName method to provide a friendly name for the object, to be used by both ATL to register the class as COM class and the same name will be available to DirectShow software: static lpctstr GetObjectFriendlyName throw return.
The application passes in an array of DMO_output_data_buffer structures, one for each output stream.These can change depending on the media type.ProcessInput method will be receiving input buffers for further processing, however this method is not expected to write any outputs.To determine whether an input stream can accept more data, call the, iMediaObject:GetInputStatus method.Because there are variables involved in any sort of data transformation, audio and video transformation must take into account the wide range of possible media configurations.Call, iMediaObject:ProcessOutput to process the data.DirectX Media Objects are.Once the project is compiled, COM registration is performed as a part of build task and DMO registration is a subtask.Otherwise, it should call ProcessInput with more input data.Additionally, some codec features are managed by using other interfaces that are specific to the codec DMOs.In addition, the DMO might have requirements about how the client packages the input data.
The DMO does not accept further input to that stream until you process the remaining output (or flush the DMO).
Starting with, getInputType method we are dealing with, dMO_media_type structure, which describes format of the data used.
The, iMediaBuffer interface acts as a COM wrapper for a block of memory.
The DMO never modifies the data in the input buffers; it writes only to the output buffers.To resolve this ambiguity, we add another method to the media object class: / CComObjectRootEx void Lock CComObjectRootEx:Lock To enable automatic registration of the media object with DirectShow/DMO infrastructure, we are putting registration as a part of COM registration of the DLL module.While registration step is not necessary, it still allows visual graph construction with the filter being developed using.DMO API : #include dshow.These interfaces are designed primarily for DMOs, but any object can support them.First of all, we need to reference relevant SDK headers to be able to use DirectShow and.
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