MIDIMessage Enumeration

BASS.NET API for the Un4seen BASS Audio Library

Midi Message Types.

Namespace: radio42.Multimedia.Midi
Assembly: Bass.Net (in Bass.Net.dll) Version: 2.4.17.5

Syntax

public enum MIDIMessage

Public Enumeration MIDIMessage

Members

Member name

Value

Description

MIM_OPEN

961

The MIM_OPEN message is sent to a MIDI input callback function when a MIDI input device is opened.

Parameters:
param1	Not used.
param2	Not used.

MIM_CLOSE

962

The MIM_CLOSE message is sent to a MIDI input callback function when a MIDI input device is closed.

Parameters:
param1	Not used.
param2	Not used.

The device handle is no longer valid after this message has been sent.

MIM_DATA

963

The MIM_DATA message is sent to a MIDI input callback function when a MIDI message is received by a MIDI input device.

Parameters:

param1

MIDI message that was received. The message is packed into a doubleword value as follows:

High word: High-order byte: Not used. Low-order byte: Contains a second byte of MIDI data (when needed).

Low word: High-order byte: Contains the first byte of MIDI data (when needed). Low-order byte: Contains the MIDI status.

The two MIDI data bytes are optional, depending on the MIDI status byte.

param2

Time that the message was received by the input device driver. The time stamp is specified in milliseconds, beginning at zero when the MIDI_InStart(IntPtr) function was called.

MIDI messages received from a MIDI input port have running status disabled; each message is expanded to include the MIDI status byte.

This message is not sent when a MIDI system-exclusive message is received.

You might used the MidiShortMessage class to construct and or unpack the message into it's components.

MIM_LONGDATA

964

The MIM_LONGDATA message is sent to a MIDI input callback function when a system-exclusive buffer has been filled with data and is being returned to the application.

Parameters:
param1	Pointer to a MIDI_HEADER structure identifying the input buffer.
param2	Time that the message was received by the input device driver. The time stamp is specified in milliseconds, beginning at zero when the MIDI_InStart(IntPtr) function was called.

The returned buffer might not be full. To determine the number of bytes recorded into the returned buffer, use the Data member of the MIDI_HEADER structure specified by param1.

MIM_ERROR

965

The MIM_ERROR message is sent to a MIDI input callback function when an invalid MIDI message is received.

Parameters:
param1	Invalid MIDI message that was received. The message is packed into a doubleword value with the first byte of the message in the low-order byte.
param2	Time that the message was received by the input device driver. The time stamp is specified in milliseconds, beginning at zero when the MIDI_InStart(IntPtr) function was called.

MIM_LONGERROR

966

The MIM_LONGERROR message is sent to a MIDI input callback function when an invalid or incomplete MIDI system-exclusive message is received.

Parameters:
param1	Pointer to a MIDI_HEADER structure identifying the buffer containing the invalid message.
param2	Time that the message was received by the input device driver. The time stamp is specified in milliseconds, beginning at zero when the MIDI_InStart(IntPtr) function was called.

The returned buffer might not be full. To determine the number of bytes recorded into the returned buffer, use the Data member of the MIDI_HEADER structure specified by param1.

MIM_MOREDATA

972

The MIM_MOREDATA message is sent to a MIDI input callback function when a MIDI message is received by a MIDI input device but the application is not processing MIM_DATA messages fast enough to keep up with the input device driver. The callback function receives this message only when the application specifies MIDI_IO_STATUS in the call to the MIDI_InOpen(IntPtr, Int32, MIDIINPROC, IntPtr, MIDIFlags) function.

Parameters:

param1

MIDI message that was received. The message is packed into a doubleword value as follows:

High word: High-order byte: Not used. Low-order byte: Contains a second byte of MIDI data (when needed).

Low word: High-order byte: Contains the first byte of MIDI data (when needed). Low-order byte: Contains the MIDI status.

The two MIDI data bytes are optional, depending on the MIDI status byte.

param2

Time that the message was received by the input device driver. The time stamp is specified in milliseconds, beginning at zero when the MIDI_InStart(IntPtr) function was called.

An application should do only a minimal amount of processing of MIM_MOREDATA messages. (In particular, applications should not call the PostMessage function while processing MIM_MOREDATA.) Instead, the application should place the event data into a buffer and then return.

When an application receives an MIM_DATA message after a series of MIM_MOREDATA messages, it has caught up with incoming MIDI events and can safely call time-intensive functions.

MIDI messages received from a MIDI input port have running status disabled; each message is expanded to include the MIDI status byte.

This message is not sent when a MIDI system-exclusive message is received.

You might used the MidiShortMessage class to construct and or unpack the message into it's components.

MOM_OPEN

967

The MOM_OPEN message is sent to a MIDI output callback function when a MIDI output device is opened.

Parameters:
param1	Not used.
param2	Not used.

MOM_CLOSE

968

The MOM_CLOSE message is sent to a MIDI output callback function when a MIDI output device is closed.

Parameters:
param1	Not used.
param2	Not used.

The device handle is no longer valid after this message has been sent.

MOM_DONE

969

The MOM_DONE message is sent to a MIDI output callback function when the specified system-exclusive or stream buffer has been played and is being returned to the application.

Parameters:
param1	Pointer to a MIDI_HEADER structure identifying the input buffer.
param2	Not used.

Reference

radio42.Multimedia.Midi Namespace