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Host 0x2B/0x2C: Intended behavior appears to be locking/unlocking

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These calls seem to prevent compatible hosts from emitting parameter changes entirely. This is like a file lock where it prevents other processes from modifying things they shouldn't.
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Xaymar
2025-08-08 01:24:10 +02:00
parent 0a9bae5e40
commit 2cfed28193
1 changed files with 12 additions and 2 deletions
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vst.h
+12 -2
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@@ -947,25 +947,35 @@ enum VST_HOST_OPCODE {
/** @sa VST_HOST_OPCODE_2A */ /** @sa VST_HOST_OPCODE_2A */
VST_HOST_OPCODE_EDITOR_UPDATE = 0x2A, VST_HOST_OPCODE_EDITOR_UPDATE = 0x2A,
//--------------------------------------------------------------------------------
// VST 2.1
//--------------------------------------------------------------------------------
/** Notify host that a parameter is being edited. /** Notify host that a parameter is being edited.
* "Locks" the parameter from being edited in compatible hosts.
* *
* @note (VST 2.1+) Available from VST 2.1 onwards.
* @param p_int1 Parameter index. * @param p_int1 Parameter index.
*/ */
VST_HOST_OPCODE_2B = 0x2B, VST_HOST_OPCODE_2B = 0x2B,
/** @sa VST_HOST_OPCODE_2B */ /** @sa VST_HOST_OPCODE_2B */
VST_HOST_OPCODE_PARAM_START_EDIT = 0x2B, VST_HOST_OPCODE_PARAM_START_EDIT = 0x2B,
/** @sa VST_HOST_OPCODE_2B */
VST_HOST_OPCODE_PARAM_LOCK = 0x2B,
/** Notify host that parameter is no longer being edited. /** Notify host that parameter is no longer being edited.
* "Unlocks" the parameter for further editing in compatible hosts. Remember to call the @ref VST_HOST_OPCODE_PARAM_UPDATE * "Unlocks" the parameter for further editing in compatible hosts. Remember to call the @ref VST_HOST_PARAM_UPDATE
* op-code afterwards so that the host knows it needs to update its automation data. * op-code afterwards so that the host knows it needs to update its automation data.
* *
* @note (VST 2.1+) Available from VST 2.1 onwards. * @note (VST 2.1+) Available from VST 2.1 onwards.
* @sa VST_HOST_OPCODE_PARAM_UPDATE * @sa VST_HOST_PARAM_UPDATE
* @param p_int1 Parameter index. * @param p_int1 Parameter index.
*/ */
VST_HOST_OPCODE_2C = 0x2C, VST_HOST_OPCODE_2C = 0x2C,
/** @sa VST_HOST_OPCODE_2C */ /** @sa VST_HOST_OPCODE_2C */
VST_HOST_OPCODE_PARAM_STOP_EDIT = 0x2C, VST_HOST_OPCODE_PARAM_STOP_EDIT = 0x2C,
/** @sa VST_HOST_OPCODE_2C */
VST_HOST_OPCODE_PARAM_UNLOCK = 0x2C,
VST_HOST_OPCODE_2D = 0x2D, VST_HOST_OPCODE_2D = 0x2D,
VST_HOST_OPCODE_2E = 0x2E, VST_HOST_OPCODE_2E = 0x2E,