ACMDRVSTREAMSIZE
The ACMDRVSTREAMSIZE structure contains information needed by an ACM driver to respond to an ACMDM_STREAM_SIZE message.
Syntax
typedef struct { DWORD cbStruct; DWORD fdwSize; DWORD cbSrcLength; DWORD cbDstLength; } ACMDRVSTREAMSIZE;
Members
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cbStruct
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Size, in bytes, of the ACMDRVSTREAMSIZE structure.
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fdwSize
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Contains one of the following flags, indicating the query type.
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ACM_STREAMSIZEF_SOURCE
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The client has specified the size, in bytes, of a source buffer in the cbSrcLength member. The driver should return the required destination buffer length in cbDstLength.
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ACM_STREAMSIZEF_DESTINATION
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the client has specified the size, in bytes, of a destination buffer in the cbDstLength member. The driver should return the required source buffer length in cbSrcLength.
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cbSrcLength
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Size, in bytes, of the source buffer. The flag value specified in fdwSize indicates whether this value is supplied by the client or by the driver.
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cbDstLength
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Size, in bytes, of the destination buffer. The flag value specified in fdwSize indicates whether this value is supplied by the client or by the driver.
Remarks
The ACMDRVSTREAMSIZE structure is declared in the header file Msacmdrv.h and defined in the file Codecmsg.d.