151 lines
4.8 KiB
C
151 lines
4.8 KiB
C
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/* $Id$ */
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/*
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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_SPEEX_H__
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#define __PJMEDIA_CODEC_SPEEX_H__
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/**
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* @file speex.h
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* @brief Speex codec header.
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*/
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#include <pjmedia-codec/types.h>
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/**
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* @defgroup PJMED_SPEEX Speex Codec Family
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* @ingroup PJMEDIA_CODEC_CODECS
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* @brief Implementation of Speex codecs (narrow/wide/ultrawide-band).
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* @{
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*
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* This section describes functions to initialize and register speex 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 Speex codec uses multiple bit rates, and supports ultra-wideband
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* (32 kHz sampling rate), wideband (16 kHz sampling rate) and narrowband
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* (telephone quality, 8 kHz sampling rate)
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*
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* By default, the speex codec factory registers three Speex codecs:
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* "speex/8000" narrowband codec, "speex/16000" wideband codec, and
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* "speex/32000" ultra-wideband codec. This behavior can be changed by
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* specifying #pjmedia_speex_options flags during initialization.
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*
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*
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* \section codec_setting Codec Settings
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*
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* \subsection 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 specific_setting Codec Specific Settings
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*
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* The following settings are applicable for this codec.
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*
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* \subsubsection quality_vs_complexity Quality vs Complexity
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*
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* The Speex codec quality versus computational complexity and bandwidth
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* requirement can be adjusted by modifying the quality and complexity
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* setting, by calling #pjmedia_codec_speex_set_param(). The RFC 5574
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* Section 5 shows the relationship between quality setting and the
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* resulting bitrate.
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*
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* The default setting of quality is specified in
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* #PJMEDIA_CODEC_SPEEX_DEFAULT_QUALITY. And the default setting of
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* complexity is specified in #PJMEDIA_CODEC_SPEEX_DEFAULT_COMPLEXITY.
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*/
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PJ_BEGIN_DECL
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/**
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* Bitmask options to be passed during Speex codec factory initialization.
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*/
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enum pjmedia_speex_options
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{
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PJMEDIA_SPEEX_NO_NB = 1, /**< Disable narrowband mode. */
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PJMEDIA_SPEEX_NO_WB = 2, /**< Disable wideband mode. */
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PJMEDIA_SPEEX_NO_UWB = 4, /**< Disable ultra-wideband mode. */
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};
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/**
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* Initialize and register Speex codec factory to pjmedia endpoint.
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*
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* @param endpt The pjmedia endpoint.
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* @param options Bitmask of pjmedia_speex_options (default=0).
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* @param quality Specify encoding quality, or use -1 for default
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* (@see PJMEDIA_CODEC_SPEEX_DEFAULT_QUALITY).
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* @param complexity Specify encoding complexity , or use -1 for default
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* (@see PJMEDIA_CODEC_SPEEX_DEFAULT_COMPLEXITY).
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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_speex_init( pjmedia_endpt *endpt,
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unsigned options,
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int quality,
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int complexity );
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/**
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* Initialize Speex codec factory using default settings and register to
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* 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_speex_init_default(pjmedia_endpt *endpt);
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/**
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* Change the settings of Speex codec.
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*
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* @param clock_rate Clock rate of Speex mode to be set.
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* @param quality Specify encoding quality, or use -1 for default
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* (@see PJMEDIA_CODEC_SPEEX_DEFAULT_QUALITY).
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* @param complexity Specify encoding complexity , or use -1 for default
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* (@see PJMEDIA_CODEC_SPEEX_DEFAULT_COMPLEXITY).
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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_speex_set_param(unsigned clock_rate,
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int quality,
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int complexity);
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/**
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* Unregister Speex codec factory from pjmedia endpoint and deinitialize
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* the Speex codec library.
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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_speex_deinit(void);
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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_SPEEX_H__ */
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