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annotate DPF-Prymula-audioplugins/dpf/distrho/src/lv2/control-input-port-change-request.h @ 3:84e66ea83026

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DPF-Prymula-audioplugins-0.231015-2
author prymula <prymula76@outlook.com>
date Mon, 16 Oct 2023 21:53:34 +0200
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1 /*
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2 LV2 ControlInputPort change request extension
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3 Copyright 2020 Filipe Coelho <falktx@falktx.com>
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4
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5 Permission to use, copy, modify, and/or distribute this software for any
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6 purpose with or without fee is hereby granted, provided that the above
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7 copyright notice and this permission notice appear in all copies.
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8
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9 THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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10 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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11 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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12 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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13 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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14 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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15 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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16 */
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17
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18 /**
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19 @file control-input-port-change-request.h
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20 C header for the LV2 ControlInputPort change request extension <http://kx.studio/ns/lv2ext/control-input-port-change-request>.
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21 */
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22
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23 #ifndef LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_H
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24 #define LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_H
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25
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26 #include "lv2.h"
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27
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28 #define LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_URI "http://kx.studio/ns/lv2ext/control-input-port-change-request"
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29 #define LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_PREFIX LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_URI "#"
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30
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31 #include <stdint.h>
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32
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33 #ifdef __cplusplus
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34 extern "C" {
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35 #else
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36 #include <stdbool.h>
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37 #endif
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38
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39 /** A status code for LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_URI functions. */
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40 typedef enum {
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41 LV2_CONTROL_INPUT_PORT_CHANGE_SUCCESS = 0, /**< Completed successfully. */
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42 LV2_CONTROL_INPUT_PORT_CHANGE_ERR_UNKNOWN = 1, /**< Unknown error. */
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43 LV2_CONTROL_INPUT_PORT_CHANGE_ERR_INVALID_INDEX = 2 /**< Failed due to invalid port index. */
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44 } LV2_ControlInputPort_Change_Status;
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45
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46 /**
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47 * Opaque handle for LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_URI feature.
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48 */
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49 typedef void* LV2_ControlInputPort_Change_Request_Handle;
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50
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51 /**
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52 * On instantiation, host must supply LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_URI feature.
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53 * LV2_Feature::data must be pointer to LV2_ControlInputPort_Change_Request.
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54 */
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55 typedef struct _LV2_ControlInputPort_Change_Request {
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56 /**
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57 * Opaque host data.
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58 */
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59 LV2_ControlInputPort_Change_Request_Handle handle;
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60
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61 /**
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62 * request_change()
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63 *
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64 * Ask the host to change a plugin's control input port value.
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65 * Parameter handle MUST be the 'handle' member of this struct.
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66 * Parameter index is port index to change.
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67 * Parameter value is the requested value to change the control port input to.
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68 *
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69 * Returns status of the request.
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70 * The host may decline this request, if e.g. it is currently automating this port.
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71 *
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72 * The plugin MUST call this function during run().
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73 */
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74 LV2_ControlInputPort_Change_Status (*request_change)(LV2_ControlInputPort_Change_Request_Handle handle,
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75 uint32_t index,
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76 float value);
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77
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78 } LV2_ControlInputPort_Change_Request;
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79
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80 #ifdef __cplusplus
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81 } /* extern "C" */
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82 #endif
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83
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84 #endif /* LV2_CONTROL_INPUT_PORT_CHANGE_REQUEST_H */