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Binaural synthesis (confbridge): Adds binaural synthesis to bridge_softmix.

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Adds binaural synthesis to bridge_softmix (via convolution using libfftw3).
Binaural synthesis is conducted at 48kHz.
For a conference, only one spatial representation is rendered.
The default rendering is applied for mono-capable channels.

ASTERISK-26292

Change-Id: Iecdb381b6adc17c961049658678f6219adae1ddf
This commit is contained in:
frahaase
2016-08-12 18:23:18 +02:00
committed by George Joseph
parent 9ad1df71b3
commit 094c26aa68
21 changed files with 52186 additions and 178 deletions
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7
include/asterisk/autoconfig.h.in
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@@ -124,6 +124,10 @@
/* Define to 1 if you have the Bluetooth library. */
#undef HAVE_BLUETOOTH
/* Define to 1 if you have the file `bridges/bridge_softmix/include/hrirs.h'.
*/
#undef HAVE_BRIDGES_BRIDGE_SOFTMIX_INCLUDE_HRIRS_H
/* Define to 1 if byteswap.h macros are available. */
#undef HAVE_BYTESWAP_H
@@ -236,9 +240,6 @@
/* Define to 1 if you have the `ffsll' function. */
#undef HAVE_FFSLL
/* Define 1 if your system has fftw. */
#undef HAVE_FFTW
/* Define to 1 if you have the LIBFFTW3 library. */
#undef HAVE_FFTW3

10
include/asterisk/bridge.h
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@@ -263,6 +263,8 @@ struct ast_bridge_softmix {
* for itself.
*/
unsigned int internal_mixing_interval;
/*! TRUE if binaural convolve is activated in configuration. */
unsigned int binaural_active;
};
/*!
@@ -867,6 +869,14 @@ void ast_bridge_set_internal_sample_rate(struct ast_bridge *bridge, unsigned int
*/
void ast_bridge_set_mixing_interval(struct ast_bridge *bridge, unsigned int mixing_interval);
/*!
* \brief Activates the use of binaural signals in a conference bridge.
*
* \param bridge Channel to activate the binaural signals.
* \param binaural_active If true binaural signal processing will be active for the bridge.
*/
void ast_bridge_set_binaural_active(struct ast_bridge *bridge, unsigned int binaural_active);
/*!
* \brief Set a bridge to feed a single video source to all participants.
*/

11
include/asterisk/bridge_channel.h
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@@ -172,6 +172,17 @@ struct ast_bridge_channel {
/*! Collected DTMF digits for DTMF hooks. */
char collected[MAXIMUM_DTMF_FEATURE_STRING];
} dtmf_hook_state;
union {
uint32_t raw;
struct {
/*! TRUE if binaural is suspended. */
unsigned int binaural_suspended:1;
/*! TRUE if a change of binaural positions has to be performed. */
unsigned int binaural_pos_change:1;
/*! Padding */
unsigned int padding:30;
};
};
};
/*!