104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/*
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* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __PJMEDIA_CODEC_G722_H__
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#define __PJMEDIA_CODEC_G722_H__
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/**
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* @file pjmedia-codec/g722.h
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* @brief G.722 codec.
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*/
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#include <pjmedia-codec/types.h>
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/**
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* @defgroup PJMED_G722 G.722 Codec
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* @ingroup PJMEDIA_CODEC_CODECS
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* @brief Implementation of G.722 Codec
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* @{
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*
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* This section describes functions to initialize and register G.722 codec
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* factory to the codec manager. After the codec factory has been registered,
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* application can use @ref PJMEDIA_CODEC API to manipulate the codec.
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*
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* The G.722 implementation uses 16-bit PCM with sampling rate 16000Hz and
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* 20ms frame length resulting in 64kbps bitrate.
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*
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* The G.722 codec implementation is provided as part of pjmedia-codec
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* library, and does not depend on external G.722 codec implementation.
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*
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* \section codec_g722_setting Codec Settings
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*
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* \subsection g722_general_setting General Settings
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*
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* General codec settings for this codec such as VAD and PLC can be
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* manipulated through the <tt>setting</tt> field in #pjmedia_codec_param.
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* Please see the documentation of #pjmedia_codec_param for more info.
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*
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* \subsection g722_specific_setting Codec Specific Settings
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*
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* Currently none.
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*/
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PJ_BEGIN_DECL
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/**
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* Initialize and register G.722 codec factory to pjmedia endpoint.
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*
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* @param endpt The pjmedia endpoint.
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*
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* @return PJ_SUCCESS on success.
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*/
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PJ_DECL(pj_status_t) pjmedia_codec_g722_init(pjmedia_endpt *endpt);
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/**
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* Unregister G.722 codec factory from pjmedia endpoint and cleanup
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* resources allocated by the factory.
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*
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* @return PJ_SUCCESS on success.
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*/
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PJ_DECL(pj_status_t) pjmedia_codec_g722_deinit(void);
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/**
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* Set the G.722 codec encoder and decoder level adjustment.
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* If the value is non-zero, then PCM input samples to the encoder will
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* be shifted right by this value, and similarly PCM output samples from
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* the decoder will be shifted left by this value.
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*
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* Default value is PJMEDIA_G722_DEFAULT_PCM_SHIFT.
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*
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* @param val The value
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*
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* @return PJ_SUCCESS on success.
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*/
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PJ_DECL(pj_status_t) pjmedia_codec_g722_set_pcm_shift(unsigned val);
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PJ_END_DECL
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/**
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* @}
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*/
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#endif /* __PJMEDIA_CODEC_G722_H__ */
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