forked from Mirrors/freeswitch
39a9e94305
This updates mod_portaudio to use the new v19 api and also contains
major behavioural changes. This initial check-in should be tested to find
any obscure use cases that lead to crashes etc...
All of the old api interface commands are now depricated and any attempt to
use them should cause a polite warning asking you to try the new single "pa" command.
New Features:
*) Mulitiple calls with hold/call switching.
*) Inbound calls can play a ring file on specified device. (global and per call)
*) Optional hold music for backgrounded calls. (global and per call)
Example dialplan usage:
<extension name="2000">
<condition field="destination_number" expression="^2000$">
<!--if the next 3 lines are omitted the defaults will be used from portaudio.conf-->
<action application="set" data="pa_ring_file=/sounds/myring.wav"/>
<action application="set" data="pa_hold_file=/sounds/myhold.wav"/>
<action application="set" data="export_vars=pa_ring_file,pa_hold_file"/>
<action application="bridge" data="portaudio"/>
</condition>
</extension>
Example API interface usage:
call extension 1000
> pa call 1000
call extension 1001 putting the other call on hold
> pa call 1001
swap the calls between hold and active
> pa switch
view the current calls
> pa list
forground the call with id 1
> pa switch 1
background all calls
> pa switch none
send a dtmf string (1234) to the current call
> pa dtmf 1234
answer the oldest unanswered inbound call
> pa answer
answer the call with id 1
> pa answer 1
hangup the active call
> pa hangup
hangup the call with id 1
> pa hangup 1
get device info
> pa dump
print usage summary
> pa help
USAGE:
--------------------------------------------------------------------------------
pa help
pa dump
pa call <dest> [<dialplan> <cid_name> <cid_num> <rate>]
pa answer [<call_id>]
pa hangup [<call_id>]
pa list
pa switch [<call_id>|none]
pa_dtmf <digit string>
--------------------------------------------------------------------------------
The source of the portaudio v19 library will also be checked in for the
sake of the build system.
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3981 d0543943-73ff-0310-b7d9-9358b9ac24b2
130 lines
4.5 KiB
Plaintext
130 lines
4.5 KiB
Plaintext
/*
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This file was a scribble area during the early phases of development.
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It's out of date but will probably hang around untill all the content
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has been cleaned out or found a new home.
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Here's some tasks to undertake:
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o- make sure that the @brief comments in each file are at least
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as good as the file descriptions below, then delete the file
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descriptions below.
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o- make sure that the coding guidelines below appear in the
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pa_proposals style guide, then delete from below.
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o- verify and move the TODO items into TRAC
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*/
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FILES:
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portaudio.h
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public api header file
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pa_front.c
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implements the interface defined in portaudio.h. manages multiple host apis.
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validates function parameters before calling through to host apis. tracks
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open streams and closes them at Pa_Terminate().
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pa_util.h
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declares utility functions for use my implementations. including utility
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functions which must be implemented separately for each platform.
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pa_hostapi.h
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hostapi representation structure used to interface between pa_front.c
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and implementations
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pa_stream.c/h
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stream interface and representation structures and helper functions
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used to interface between pa_front.c and implementations
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pa_cpuload.c/h
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source and header for cpu load calculation facility
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pa_trace.c/h
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source and header for debug trace log facility
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pa_converters.c/h
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sample buffer conversion facility
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pa_dither.c/h
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dither noise generator
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pa_process.c/h
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callback buffer processing facility including interleave and block adaption
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pa_allocation.c/h
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allocation context for tracking groups of allocations
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pa_skeleton.c
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an skeleton implementation showing how the common code can be used.
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pa_win_util.c
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Win32 implementation of platform specific PaUtil functions (memory allocation,
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usec clock, Pa_Sleep().) The file will be used with all Win32 host APIs.
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pa_win_hostapis.c
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contains the paHostApiInitializers array and an implementation of
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Pa_GetDefaultHostApi() for win32 builds.
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pa_win_wmme.c
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Win32 host api implementation for the windows multimedia extensions audio API.
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pa_win_wmme.h
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public header file containing interfaces to mme-specific functions and the
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deviceInfo data structure.
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CODING GUIDELINES:
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naming conventions:
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#defines begin with PA_
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#defines local to a file end with _
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global utility variables begin with paUtil
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global utility types begin with PaUtil (including function types)
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global utility functions begin with PaUtil_
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static variables end with _
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static constants begin with const and end with _
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static funtions have no special prefix/suffix
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In general, implementations should declare all of their members static,
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except for their initializer which should be exported. All exported names
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should be preceeded by Pa<MN>_ where MN is the module name, for example
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the windows mme initializer should be named PaWinWmme_Initialize().
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Every host api should define an initializer which returns an error code
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and a PaHostApiInterface*. The initializer should only return an error other
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than paNoError if it encounters an unexpected and fatal error (memory allocation
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error for example). In general, there may be conditions under which it returns
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a NULL interface pointer and also returns paNoError. For example, if the ASIO
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implementation detects that ASIO is not installed, it should return a
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NULL interface, and paNoError.
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Platform-specific shared functions should begin with Pa<PN>_ where PN is the
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platform name. eg. PaWin_ for windows, PaUnix_ for unix.
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The above two conventions should also be followed whenever it is necessary to
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share functions accross multiple source files.
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Two utilities for debug messages are provided. The PA_DEBUG macro defined in
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pa_implementation.h provides a simple way to print debug messages to stderr.
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Due to real-time performance issues, PA_DEBUG may not be suitable for use
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within the portaudio processing callback, or in other threads. In such cases
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the event tracing facility provided in pa_trace.h may be more appropriate.
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If PA_LOG_API_CALLS is defined, all calls to the public PortAudio API
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will be logged to stderr along with parameter and return values.
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TODO: (these need to be turned into TRAC items)
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write some new tests to exercise the multi-host-api functions
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write (doxygen) documentation for pa_trace (phil?)
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create a global configuration file which documents which PA_ defines can be
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used for configuration
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need a coding standard for comment formatting
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write style guide document (ross)
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