Prosody speech processing

The Prosody speech processing API consists of functions which implement functionality such as record and replay of speech (or other sound), tone detection and generation, conferencing, and echo cancellation.

The programming interface

The declarations for this API are in apilib/smbesp.h and applications using this library must be linked with the appropriate object file, which is

• apilib/gen-LINUX_V6/TiNGcore.o (Linux),
• apilib/gen-QNX/TiNGcore.o (QNX),
• apilib/gen-SOL_32_V6/TiNGcore.o (Solaris 32-bit),
• apilib/gen-SOL_64_V6/TiNGcore.o (Solaris 64-bit),
• or apilib/gen-WINNT_V6/TiNGcore.obj (Windows).

Initialisation

From time to time new features are added to this API. This may require new fields to be added to structures. A mechanism is available to ensure that this does not cause any problems for code developed prior to the addition. This is achieved by defining all new fields such that the value zero selects backward compatible behaviour. To take advantage of this, structures should be cleared before use. For example,

	SM_CHANNEL_REPLAY_PARMS ap;
	memset(&ap, 0, sizeof(ap));
	ap.type = kSMDataFormatFullDuplex;
		... etc

This ensures that if a new field is ever added to this structure the new field is not left uninitialised.

Return values

The list of error codes that a function can return is only a list of typical errors. If a function is described as returning a standard error then it can return any such error. Also, when the description of a function says that it can return a particular error code (for example, ERR_SM_FIRMWARE_NOT_RUNNING), this does not mean that the function guarantees to detect this error condition in all circumstances. It merely means that if it does detect this error condition, then this is the code it will return.

Details of functions

API details by function

This is part of Prosody.