TABLE OF CONTENTS narrator.device/AbortIO narrator.device/OpenDevice narrator.device/CMD_FLUSH narrator.device/CMD_READ narrator.device/CMD_RESET narrator.device/CMD_START narrator.device/CMD_STOP narrator.device/CMD_WRITE narrator.device/CloseDevice narrator.device/AbortIO narrator.device/AbortIO NAME AbortIO - Abort an IO request SYNOPSIS AbortIO(IORequest) A1 FUNCTION Exec library call to abort a specified READ or WRITE request. The IORequest may be in the queue or currently active. If currently active, the request is immediately stopped and then removed. INPUTS Pointer to the IORequest block to be aborted. RESULTS io_Error field in the IORequest block set to #IOERR_ABORTED. SEE ALSO narrator.device/CloseDevice narrator.device/CloseDevice NAME CloseDevice - terminates access to the narrator device SYNOPSIS CloseDevice(IORequest) A1 FUNCTION Close invalidates the IO_UNIT and IO_DEVICE fields in the IORequest block, preventing subsequent IO until another OpenDevice. CloseDevice also reduces the open count. If the count goes to 0 and the expunge bit is set, the device is expunged. If the open count goes to zero and the delayed expunge bit is not set, CloseDevice sets the expunge bit. INPUTS A valid IORequest block with its io_Message structure, and io_Device and io_Unit fields properly initialized. These fields are initialized by OpenDevice. RESULTS CloseDevice invalidates the unit and device pointers in the IORequest block. SEE ALSO narrator.device/CMD_FLUSH narrator.device/CMD_FLUSH NAME CMD_FLUSH - Aborts all inprogress and queued requests SYNOPSIS Standard device command. FUNCTION Aborts all inprogress and queued speech requests. INPUTS Valid IORequest block with the io_Command field set to CMD_FLUSH. A valid IORequest block is one with its io_Message structure, and io_Device and io_Unit fields properly initialized. The easiest way to insure proper initialization is to make a copy of the IORequest block after a successful OpenDevice call. RESULTS io_Error in IORequest block set to 0 SEE ALSO Exec input/output documentation. narrator.device/CMD_Read narrator.device/CMD_Read NAME CMD_READ - Query the narrator device for mouth shape or other synchronization events. SYNOPSIS Standard device command. FUNCTION Currently, there are three events which the user can inquire about from the narrator device. These are: mouth shape changes, start of word, and start of syllable. Each read request returns information about any or all of these events as determined by the bits set in the sync field of the read IORequest block. In the case of mouth shape changes, each shape returned is guaranteed to be different from the previously returned shape to allow updating to be done only when necessary. Each read request is associated with a write request by information contained in the IORequest block used to open the device. Since the first field in the read IORequest block is a write IORequest structure, this association is easily made by copying the write IORequest block (after the OpenDevice call) into the voice field of the read IORequest block. If there is no write in progress or in the device input queue with the same pseudo unit number as the read request, the read will be returned to the user with an error. This is also how the user knows that the write request has finished and that s/he should not issue any more reads. Note that in this case the mouth shapes may not be different from previously returned values. INPUTS mouth_rb IORequest block with the voice field (a narrator_rb structure) copied from the associated write request with the following fields modified: io_Message - Pointer to message port for read request io_Command - CMD_READ io_Error - Clear before issuing first read width - 0 height - 0 RESULTS As long as the speech is in progress, each read returns the following information in the mouth_rb IORequest block. If mouth shape changes are requested the following fields are modified: width - Contains mouth width value in arbitrary units height - Contains mouth height value in arbitrary units shape - Compressed form of mouth shapes (internal use only) ****** NEW FOR V37 NARRATOR If word synchronization is requested: sync - Bit NDB_WORDSYNC is set If syllable synchronization is requested: sync - Bit NDB_SYLSYNC is set Note that any or all of the above fields can be set and it is the user's responsibility to check for all possibilities. SEE ALSO CMD_WRITE Exec input/output documentation. narrator.device/CMD_RESET narrator.device/CMD_RESET NAME CMD_RESET - Reset the device to a known state SYNOPSIS Standard device command. FUNCTION Resets the device as though it has just be initialized. Aborts all read/write requests whether active of enqueued. Restarts device if it has been stopped. INPUTS Valid IORequest block with the io_Command field set to CMD_RESET. A valid IORequest block is one with its io_Message structure, and io_Device and io_Unit fields properly initialized. The easiest way to insure proper initialization is to make a copy of the IORequest block after a successful OpenDevice call. RESULTS SEE ALSO Exec input/output documentation. narrator.device/CMD_START narrator.device/CMD_START NAME CMD_START - Restarts the device after a CMD_STOP command SYNOPSIS Standard device command. FUNCTION CMD_START restarts the currently active speech (if any) and allows queued requests to start. INPUTS Valid IORequest block with the io_Command field set to CMD_START A valid IORequest block is one with its io_Message structure, and io_Device and io_Unit fields properly initialized. The easiest way to insure proper initialization is to make a copy of the IORequest block after a successful OpenDevice call. RESULTS io_Error set to 0. SEE ALSO Exec input/output documentation. narrator.device/CMD_STOP narrator.device/CMD_STOP NAME CMD_STOP - Stops the device. SYNOPSIS Standard device command. FUNCTION CMD_STOP halts the currently active speech (if any) and prevents any queued requests from starting. INPUTS Valid IORequest block with the io_Command field set to CMD_STOP. A valid IORequest block is one with its io_Message structure, and io_Device and io_Unit fields properly initialized. The easiest way to insure proper initialization is to make a copy of the IORequest block after a successful OpenDevice call. RESULTS io_Error set to 0. SEE ALSO Exec input/output documentation. narrator.device/CMD_WRITE narrator.device/CMD_WRITE NAME CMD_WRITE - Send speech request to the narrator device SYNOPSIS Standard device command. FUNCTION Sends a phonetic string to the narrator device to be spoken and, optionally, is used to direct the narrator device to return mouth shape changes, and word and syllable sync events in response to read requests from the user. The phonetic string consists of ASCII characters representing the individual phonemes. Refer to the narrator device chapter of the libraries and devices volume of the ROM Kernel Manual for detailed information. INPUTS User IORequest block (struct narrator_rb as defined in .h file). The OpenDevice call will initialize the IORequest block to a "standard male" voice. If you want to change any parms, do so after the OpenDevice call and before the DoIO (or SendIO/WaitIO). For a complete description of the narrator_rb structure, see the narrator.h or .i include file. Note that the OpenDevice call does not initialize all the fields needed by the narrator device. The IORequest fields which must be set by the user before issuing the write request are: io_Command - Set to CMD_WRITE io_Data - Pointer to phonetic string io_Length - Length of phonetic string ch_masks - Array of audio channel selection masks (see audio device documentation for description of this field) nm_masks - Number of audio channel selection masks ****** NEW FOR V37 NARRATOR flags - The bit NDB_NEWIORB must be set in the flags field if any of the new features of the V37 narrator are used In addition to producing synthetic speech, the narrator device also provides features for synchronizing the speech to animation or other user defined events. There are three types of events that the user can request. They are mouth shape changes, start of new word, and start of new syllable. Mouth shape changes are requested by setting the mouths field of the IORequest block to a non-zero value. Word and syllable sync events are requested by setting the NDB_WORDSYNC and/or NDB_SYLSYNC bits in the flags field of the IORequest block. Note that word and syllable sync only work in V37 and later versions of the narrator device. RESULTS The narrator device range checks and performs other validity checks for all input parms. If any input is in error, the device sets the io_Error field of the IORequest block to an appropriate value (see include files for error codes). If everything is in order, the narrator device will produce the speech and clear the io_Error field. The io_Actual field is set to the length of the input string that was actually processed. If the return code indicates a phoneme error (ND_PhonErr), io_Actual is the NEGATIVE of the position in the input string where the error occured. SEE ALSO Read command. Audio device documentation. Exec input/output documentation. narrator.device/OpenDevice narrator.device/OpenDevice NAME OpenDevice - opens the narrator device. SYNOPSIS error = OpenDevice("narrator.device", unit, IORequest, flags); D0 A0 D0 A1 D1 FUNCTION The OpenDevice routine grants access to the narrator device. OpenDevice checks the unit number, and if non-zero, returns an error (ND_UnitErr). If this is the first time the driver has been opened, OpenDevice will attempt to open the audio device and allocate the driver's static buffers. If either of these operations fail, an error is returned. See the .h and .i include files for possible error return codes. Next, OpenDevice (done for all opens, not just the first one) initializes various fields in the user's IORequest block (see below). If users wish to use non-default values for these parms, the values must be set after the open is done. OpenDevice also assigns a pseudo unit number to the IORB for use in synchronizing read and write requests. See the read command for more details. Finally, OpenDevice stores the device node pointer in the IORequest block and clears the delayed expunge bit. ***** NEW FOR V37 NARRATOR ***** Several new fields in the IORequest block have been added for V37 narrator. These fields are initialized when the device is opened if the NDB_NEWIORB bit is set in the flags field of the user's IORequest block. Note that NDB_NEWIORB is set in the IORequest block, NOT in the "flags" input parm to the OpenDevice call. INPUTS device - "narrator.device" unit - 0 IORequest - Pointer to the user's IORequest block flags - 0 RESULTS The narrator device will initialize the IORequest block as follows (assume IORB points to the IOrequest block): IORB->rate = 150; /* Speaking rate in words/minute */ IORB->pitch = 110; /* Baseline pitch in Hertz */ IORB->mode = NATURALF0; /* Pitch (F0) mode */ IORB->sex = MALE; /* Sex of voice */ IORB->volume = 64 /* Volume, full on */ IORB->sampfreq = 22200 /* Audio sampling freq */ IORB->mouths = 0 /* Don't generate sync events */ and if the NDB_NEWIORB bit is set: IORB->F0enthusiasm = 0 /* F0 excursion factor */ IORB->F0perturb = 32 /* F0 perturbation (in 32nds) */ IORB->F1adj = 0 /* F1 adjustment in ±5% steps */ IORB->F2adj = 0 /* F2 adjustment in ±5% steps */ IORB->F3adj = 0 /* F3 adjustment in ±5% steps */ IORB->A1adj = 0 /* A1 adjustment in decibels */ IORB->A2adj = 0 /* A2 adjustment in decibels */ IORB->A3adj = 0 /* A3 adjustment in decibels */ IORB->articulate = 100 /* Transition time multiplier */ IORB->centralize = 0 /* Degree of vowel centralization */ IORB->centphon = "" /* Pointer to central ASCII phon */ IORB->AVbias = 0 /* AV bias */ IORB->AFbias = 0 /* AF bias */ IORB->priority = 100 /* Priority while speaking */ SEE ALSO The include files contain the complete IORequest block definition, default settings, and error return codes. Exec input/output documentation.
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