[wdmaudiodev] Virtual Audio Device + Device Not Found Error
- From: "Dale Hill" <daleh@xxxxxxxxxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 6 Apr 2011 21:06:55 -0600
All,
I'm developing a Virtual audio filter based on avstream to perform rendering
and capturing.
Using GraphEdit, I am able to insert my filter and connect the capture
output of avssamp to the render input of my filter. But, when I try to start
the graph I get the following error message:
"This graph cannot play. The device is not connected (Return Code:
0x8007048F)". This message appears immediately before SetState or Process
gets called. Below is the descriptor describing the filter. Any ideas would
be greatly appreciated.
Thanks!
// Filter Descriptors
//
// Pin Data Range
const
KSDATARANGE_AUDIO
FilterPinDataRange =
{
{
sizeof(KSDATARANGE_AUDIO), // Format Size
0, // Flags
0, // Sample Size
0, // Reserved
STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO), // Major Format
STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM), // Format Sub Type
STATICGUIDOF(KSDATAFORMAT_SPECIFIER_WAVEFORMATEX), // Format
Specifier
},
MAX_AUDIO_CHANNELS, // Max Channels
BITS_PER_SAMPLE, // Max Bits per sample
BITS_PER_SAMPLE, // Min Bits per sample
MIN_SAMPLE_FREQ, // Min Sample Frequency
MAX_SAMPLE_FREQ // Max Sample Frequency
};
const
PKSDATARANGE
FilterPinDataRanges[1] = {(PKSDATARANGE)&FilterPinDataRange};
// Framing Requirements
DECLARE_SIMPLE_FRAMING_EX(
FilterPinAllocatorFraming, // Structure Name
STATICGUIDOF(KSMEMORY_TYPE_KERNEL_NONPAGED),// Memory Type
KSALLOCATOR_REQUIREMENTF_SYSTEM_MEMORY, // Flags
MAX_OUTSTANDING_FRAMES, // Frames Outstanding
1, // Alignment
FRAME_SIZE, // Min Frame Size
FRAME_SIZE); // Max Frame Size
// Capture Pin Dispatch Table
const
KSPIN_DISPATCH
FilterCapturePinDispatch =
{
CFilterCapturePin::DispatchCreate, // Pin Create
NULL, // Pin Close
CFilterCapturePin::DispatchProcess, // Pin Process
NULL, // Pin Reset
CFilterPin::DispatchSetFormat, // Pin Set Data Format
CFilterPin::DispatchSetState, // Pin Set Device State
NULL, // Pin Connect
NULL, // Pin Disconnect
NULL, // Clock Dispatch
NULL // Allocator Dispatch
};
// Render Pin Dispatch Table
const
KSPIN_DISPATCH
FilterRenderPinDispatch =
{
CFilterRenderPin::DispatchCreate, // Pin Create
NULL, // Pin Close
CFilterRenderPin::DispatchProcess, // Pin Process
NULL, // Pin Reset
CFilterPin::DispatchSetFormat, // Pin Set Data Format
CFilterPin::DispatchSetState, // Pin Set Device State
NULL, // Pin Connect
NULL, // Pin Disconnect
NULL, // Clock Dispatch
NULL // Allocator Dispatch
};
//
// Pin Descriptors
//
const
KSPIN_DESCRIPTOR_EX
FilterPinDescriptors[] =
{
// Render Pin
{
&FilterRenderPinDispatch, // Dispatch Table
NULL, // Automatic Table,
{ // KSPIN_DESCRIPTOR
0, // Interface Count
NULL, // Interfaces
0, // Media Count
NULL, // Media Types
SIZEOF_ARRAY(FilterPinDataRanges), // Data Range Count
FilterPinDataRanges, // Data Range
KSPIN_DATAFLOW_IN, // Data Flow,
KSPIN_COMMUNICATION_BOTH, // Communications
&KSCATEGORY_AUDIO, // Catagory GUID
&KSCATEGORY_AUDIO, // Pin name GUID
0 // Reserved
},
KSPIN_FLAG_GENERATE_MAPPINGS | // Flags
KSPIN_FLAG_FRAMES_NOT_REQUIRED_FOR_PROCESSING |
KSPIN_FLAG_DO_NOT_INITIATE_PROCESSING |
KSPIN_FLAG_PROCESS_IN_RUN_STATE_ONLY |
KSPIN_FLAG_FIXED_FORMAT |
KSPIN_FLAG_DISPATCH_LEVEL_PROCESSING |
KSPIN_FLAG_USE_STANDARD_TRANSPORT |
KSPIN_FLAG_RENDERER,
MAX_RENDER_PINS, // Instances Possible
0, // Instances necessary
&FilterPinAllocatorFraming, // Frameing
reinterpret_cast<PFNKSINTERSECTHANDLEREX>(CFilterPin::IntersectHandler)
},
// Capture Pin
{
&FilterCapturePinDispatch, // Dispatch Table
NULL, // Automatic Table,
{ // KSPIN_DESCRIPTOR
0, // Interface Count
NULL, // Interfaces
0, // Media Count
NULL, // Media Types
SIZEOF_ARRAY(FilterPinDataRanges), // Data Range Count
FilterPinDataRanges, // Data Ranges
KSPIN_DATAFLOW_OUT, // Data Flow,
KSPIN_COMMUNICATION_BOTH, // Communications
&KSCATEGORY_CAPTURE, // Catagory GUID
&KSCATEGORY_CAPTURE, // Pin name GUID
0 // Reserved
},
KSPIN_FLAG_GENERATE_MAPPINGS | // Flags
KSPIN_FLAG_PROCESS_IN_RUN_STATE_ONLY |
KSPIN_FLAG_FIXED_FORMAT |
KSPIN_FLAG_USE_STANDARD_TRANSPORT,
MAX_CAPTURE_PINS, // Instances Possible
0, // Instances necessary
&FilterPinAllocatorFraming, // Framing
reinterpret_cast<PFNKSINTERSECTHANDLEREX>(CFilterPin::IntersectHandler)
}
};
// Filter Categories
const
GUID
FilterFilterCategories[2] =
{
STATICGUIDOF(KSCATEGORY_RENDER),
STATICGUIDOF(KSCATEGORY_CAPTURE)
};
// Filter Dispatch Table
const
KSFILTER_DISPATCH
FilterFilterDispatch =
{
CFilterAudioFilter::DispatchCreate, // Filter Create
NULL, // Filter Close
NULL, // Filter Process
NULL // Filter Reset
};
// Filter Descriptor
const
KSFILTER_DESCRIPTOR
FilterFilterDescriptor =
{
&FilterFilterDispatch, // Dispatch Table
NULL, // Automatic Table
KSFILTER_DESCRIPTOR_VERSION, // Version
0, // Flags
&KSNAME_Filter, // Reference GUID
DEFINE_KSFILTER_PIN_DESCRIPTORS(FilterPinDescriptors),
DEFINE_KSFILTER_CATEGORIES(FilterFilterCategories), // Catagory Count
and catagories
DEFINE_KSFILTER_NODE_DESCRIPTORS_NULL, // Node Count, Size,
Descriptor
DEFINE_KSFILTER_DEFAULT_CONNECTIONS, // Connection Count and
Connections
NULL
};
//
// Device and filter Descriptors
//
// FilterFilterDescriptor:
//
// The filter descriptor for the Filter Filter.
DEFINE_KSFILTER_DESCRIPTOR_TABLE (FilterDescriptors)
{
&FilterFilterDescriptor
};
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