Customer application framework:play audio files: Difference between revisions
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The CAF (customer application framework) API offers functions to play or record audio files: | The CAF (customer application framework) API offers functions to play or record audio files: | ||
On call legs (CTBCAFCallLeg): | On call legs (''CTBCAFCallLeg''): | ||
* PlayStream() | * ''PlayStream()'' | ||
* RecordStream() | * ''RecordStream()'' | ||
On audio mixers (CTBCAFMixer): | On audio mixers (''CTBCAFMixer''): | ||
* MixerPlayStream() | * ''MixerPlayStream()'' | ||
* MixerRecordStream() | * ''MixerRecordStream()'' | ||
It also offers callbacks, on the call flow and call behavior classes (based on CTBCAFCallFlow or CTBCAFCallBehavior) to notify the application when files have started playing/recording, and stopped playing/recording: | It also offers callbacks, on the call flow and call behavior classes (based on ''CTBCAFCallFlow'' or ''CTBCAFCallBehavior'') to notify the application when files have started playing/recording, and stopped playing/recording: | ||
* OnStreamPlayingStarted() | * ''OnStreamPlayingStarted()'' | ||
* OnStreamPlayingDone() | * ''OnStreamPlayingDone()'' | ||
* OnStreamRecordingStarted() | * ''OnStreamRecordingStarted()'' | ||
* OnStreamRecordingDone() | * ''OnStreamRecordingDone()'' | ||
* OnMixerStreamPlayingStarted() | * ''OnMixerStreamPlayingStarted()'' | ||
* OnMixerStreamPlayingDone() | * ''OnMixerStreamPlayingDone()'' | ||
* OnMixerStreamRecordingStarted() | * ''OnMixerStreamRecordingStarted()'' | ||
* OnMixerStreamRecordingDone() | * ''OnMixerStreamRecordingDone()'' | ||
= API parameters = | |||
== ''PlayStream''/''MixerPlayStream'' == | |||
Class ''CTBCAFPlayAttributes'' is used to build play attributes. Available attributes are: | |||
* ''AddPlayFilePath'': Add a file to the list of files to play. Has some parameters: | |||
** File path (or URI) | |||
** Start/end offsets (optional) | |||
** Repeat count (optional) specific for this file in the sequence of files | |||
* ''fAllowBargeInInterruption'': Allow barge-in interruption (automatic stopping of playback upon detected DTMF) | |||
* ''fPrepareForRecording'': Prepare hardware resources for recording (pre-reserve recording resources) | |||
* ''un32RepeatCount'': Number of times to play the whole file sequence of files | |||
* ''fNotifyStartOfNewFile'': Asks for OnStreamPlayingStarted (or OnMixerStreamPlayingStarted) events for each file in the sequence of files (otherwise, one for the whole sequence) | |||
* ''s8AudioGainDB'': Gain (or loss) of audio level | |||
* ''fAllowMixing'': Allow this playing sequence to be mixed with another file sequence simultaneously playing to the same call leg (or mixer) | |||
* ''un8PlayIndex'': Sequence "index" (0 to 3) to assign to this playing sequence. Will replace a previous playing sequence using the same index, but will be mixed with simultaneously playing sequences with other indexes on the same call leg (or mixer). | |||
* ''fPaused'': Prepare the playback, but stay paused at start-up | |||
= Features for playing files = | = Features for playing files = | ||
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== Playing a chain of multiple files == | == Playing a chain of multiple files == | ||
== Start/end offsets, repeat count == | == Start/end offsets, repeat count == | ||
== Pause/Resume == | |||
== Live transcoding == | == Live transcoding == | ||
== Audio gain == | |||
== Playing remote (HTTP) files == | == Playing remote (HTTP) files == | ||
== RAM caching == | == RAM caching == | ||
Revision as of 11:28, 20 November 2012
Overview
The CAF (customer application framework) API offers functions to play or record audio files:
On call legs (CTBCAFCallLeg):
- PlayStream()
- RecordStream()
On audio mixers (CTBCAFMixer):
- MixerPlayStream()
- MixerRecordStream()
It also offers callbacks, on the call flow and call behavior classes (based on CTBCAFCallFlow or CTBCAFCallBehavior) to notify the application when files have started playing/recording, and stopped playing/recording:
- OnStreamPlayingStarted()
- OnStreamPlayingDone()
- OnStreamRecordingStarted()
- OnStreamRecordingDone()
- OnMixerStreamPlayingStarted()
- OnMixerStreamPlayingDone()
- OnMixerStreamRecordingStarted()
- OnMixerStreamRecordingDone()
API parameters
PlayStream/MixerPlayStream
Class CTBCAFPlayAttributes is used to build play attributes. Available attributes are:
- AddPlayFilePath: Add a file to the list of files to play. Has some parameters:
- File path (or URI)
- Start/end offsets (optional)
- Repeat count (optional) specific for this file in the sequence of files
- fAllowBargeInInterruption: Allow barge-in interruption (automatic stopping of playback upon detected DTMF)
- fPrepareForRecording: Prepare hardware resources for recording (pre-reserve recording resources)
- un32RepeatCount: Number of times to play the whole file sequence of files
- fNotifyStartOfNewFile: Asks for OnStreamPlayingStarted (or OnMixerStreamPlayingStarted) events for each file in the sequence of files (otherwise, one for the whole sequence)
- s8AudioGainDB: Gain (or loss) of audio level
- fAllowMixing: Allow this playing sequence to be mixed with another file sequence simultaneously playing to the same call leg (or mixer)
- un8PlayIndex: Sequence "index" (0 to 3) to assign to this playing sequence. Will replace a previous playing sequence using the same index, but will be mixed with simultaneously playing sequences with other indexes on the same call leg (or mixer).
- fPaused: Prepare the playback, but stay paused at start-up