libcm is a C development framework with an emphasis on audio signal processing applications.
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  1. #ifndef cmRtSysMsg_h
  2. #define cmRtSysMsg_h
  3. #ifdef __cplusplus
  4. extern "C" {
  5. #endif
  6. // Reserved DSP message selector id's (second field of all
  7. // host<->audio system messages)
  8. enum
  9. {
  10. kMidiMsgArraySelRtId = 1000,
  11. kMidiSysExSelRtId,
  12. kUiDrvrSelRtId, // cmUiDriverArg_t message to/from the UI driver
  13. kUiSelRtId, // cmUiDriverArg_t message from the UI mgr to a client
  14. kUiMstrSelRtId, // indicates a cmDspUiHdr_t msg containing master control information for the audio system
  15. kStatusSelRtId, // indicates the msg is of type cmRtSysStatus_t
  16. kNetSyncSelRtId, // sent with a cmDspNetMsg_t object
  17. kMsgSelRtId, // client defined msg transmitted between threads or network nodes
  18. };
  19. typedef struct
  20. {
  21. unsigned rtSubIdx;
  22. unsigned selId; // Message selector id See kXXXSelRtId above
  23. } cmRtSysMsgHdr_t;
  24. // All of the UI messages that create a UI control contain an array of integers
  25. // as in the 'value' field. The array contains the id's associated with
  26. // the different programmable paramters which are part of the control.
  27. // For example a slider control has minimum,maximum, step size, and value
  28. // parameters. The location in the array is hard coded according to the
  29. // parameters meaning but the actual value of the id is left up to the
  30. // engine. This allows the engine to use whatever values work best for
  31. // it on a per instance basis.
  32. // Header record for all messages between the host and the DSP controllers.
  33. typedef struct
  34. {
  35. cmRtSysMsgHdr_t hdr;
  36. unsigned devIdx;
  37. unsigned chIdx;
  38. bool inFl;
  39. unsigned ctlId;
  40. double value;
  41. } cmRtSysMstr_t;
  42. // Control id's used to identify the control type of master contols.
  43. enum
  44. {
  45. kSliderUiRtId = 0,
  46. kMeterUiRtId = 1,
  47. kMuteUiRtId = 2,
  48. kToneUiRtId = 3,
  49. kPassUiRtId = 4
  50. };
  51. // Audio sub-system status record - this message can be transmitted to the host at
  52. // periodic intervals. See cmRtSysStatusNotifyEnable().
  53. // When transmitted to the host this record acts as the message header.
  54. // This header is followed by two arrays of doubles containing the input
  55. // and output meter values associated with the input and output audio devices.
  56. // Message Layout:
  57. // [ rtSubIdx kStatusSelId cmRtSysStatus_t iMeterArray[iMeterCnt] oMeterArray[oMeterCnt] ]
  58. typedef struct
  59. {
  60. cmRtSysMsgHdr_t hdr;
  61. unsigned updateCnt; // count of callbacks from the audio devices.
  62. unsigned wakeupCnt; // count of times the audio system thread has woken up after the cond. var has been signaled by the audio update thread.
  63. unsigned msgCbCnt; // count of msgs delivered via cmRtCallback() .
  64. unsigned audioCbCnt; // count of times the DSP execution was requested via cmRtCallback().
  65. unsigned iDevIdx; // Input device index
  66. unsigned oDevIdx; // Output device index
  67. unsigned overflowCnt; // count of times the audio input buffers overflowed
  68. unsigned underflowCnt; // count of times the audio output buffers underflowed
  69. unsigned iMeterCnt; // count of input meter channels
  70. unsigned oMeterCnt; // count of output meter channels
  71. } cmRtSysStatus_t;
  72. typedef struct
  73. {
  74. cmRtSysMsgHdr_t hdr;
  75. unsigned devIdx;
  76. unsigned portIdx;
  77. unsigned msgCnt;
  78. // cmMidiMsg msgArray[msgCnt]
  79. } cmRtSysMidi_t;
  80. typedef struct
  81. {
  82. cmRtSysMsgHdr_t hdr; // hdr.rtSubIdx = dest rtSubIdx
  83. // hdr.selId = msg contents
  84. unsigned dstEndPtId; // = dest endpoint
  85. unsigned srcEndPtId; // = src endpoint id
  86. unsigned srcNodeIdx; // = src node index (filled in by receiving cmRtNet mgr)
  87. // char msg[ msgByteCnt ]
  88. } cmRtNetMsg_t;
  89. #ifdef __cplusplus
  90. }
  91. #endif
  92. #endif