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+/* $Id$ */
+/* 
+ * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#ifndef __PJMEDIA_CODEC_SPEEX_H__
+#define __PJMEDIA_CODEC_SPEEX_H__
+
+/**
+ * @file speex.h
+ * @brief Speex codec header.
+ */
+
+#include <pjmedia-codec/types.h>
+
+/**
+ * @defgroup PJMED_SPEEX Speex Codec Family
+ * @ingroup PJMEDIA_CODEC_CODECS
+ * @brief Implementation of Speex codecs (narrow/wide/ultrawide-band).
+ * @{
+ *
+ * This section describes functions to initialize and register speex codec
+ * factory to the codec manager. After the codec factory has been registered,
+ * application can use @ref PJMEDIA_CODEC API to manipulate the codec.
+ *
+ * The Speex codec uses multiple bit rates, and supports ultra-wideband 
+ * (32 kHz sampling rate), wideband (16 kHz sampling rate) and narrowband 
+ * (telephone quality, 8 kHz sampling rate)
+ *
+ * By default, the speex codec factory registers three Speex codecs:
+ * "speex/8000" narrowband codec, "speex/16000" wideband codec, and 
+ * "speex/32000" ultra-wideband codec. This behavior can be changed by
+ * specifying #pjmedia_speex_options flags during initialization.
+ *
+ *
+ * \section codec_setting Codec Settings
+ *
+ * \subsection general_setting General Settings
+ *
+ * General codec settings for this codec such as VAD and PLC can be 
+ * manipulated through the <tt>setting</tt> field in #pjmedia_codec_param. 
+ * Please see the documentation of #pjmedia_codec_param for more info.
+ *
+ * \subsection specific_setting Codec Specific Settings
+ *
+ * The following settings are applicable for this codec.
+ *
+ * \subsubsection quality_vs_complexity Quality vs Complexity
+ *
+ * The Speex codec quality versus computational complexity and bandwidth
+ * requirement can be adjusted by modifying the quality and complexity
+ * setting, by calling #pjmedia_codec_speex_set_param(). The RFC 5574
+ * Section 5 shows the relationship between quality setting and the
+ * resulting bitrate.
+ *
+ * The default setting of quality is specified in 
+ * #PJMEDIA_CODEC_SPEEX_DEFAULT_QUALITY. And the default setting of
+ * complexity is specified in #PJMEDIA_CODEC_SPEEX_DEFAULT_COMPLEXITY.
+ */
+
+PJ_BEGIN_DECL
+
+
+/**
+ * Bitmask options to be passed during Speex codec factory initialization.
+ */
+enum pjmedia_speex_options
+{
+    PJMEDIA_SPEEX_NO_NB	    = 1,    /**< Disable narrowband mode.	*/
+    PJMEDIA_SPEEX_NO_WB	    = 2,    /**< Disable wideband mode.		*/
+    PJMEDIA_SPEEX_NO_UWB    = 4,    /**< Disable ultra-wideband mode.	*/
+};
+
+
+/**
+ * Initialize and register Speex codec factory to pjmedia endpoint.
+ *
+ * @param endpt		The pjmedia endpoint.
+ * @param options	Bitmask of pjmedia_speex_options (default=0).
+ * @param quality	Specify encoding quality, or use -1 for default 
+ *			(@see PJMEDIA_CODEC_SPEEX_DEFAULT_QUALITY).
+ * @param complexity	Specify encoding complexity , or use -1 for default 
+ *			(@see PJMEDIA_CODEC_SPEEX_DEFAULT_COMPLEXITY).
+ *
+ * @return		PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pjmedia_codec_speex_init( pjmedia_endpt *endpt,
+					       unsigned options,
+					       int quality,
+					       int complexity );
+
+
+/**
+ * Initialize Speex codec factory using default settings and register to 
+ * pjmedia endpoint.
+ *
+ * @param endpt		The pjmedia endpoint.
+ *
+ * @return		PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pjmedia_codec_speex_init_default(pjmedia_endpt *endpt);
+
+
+/**
+ * Change the settings of Speex codec.
+ *
+ * @param clock_rate	Clock rate of Speex mode to be set.
+ * @param quality	Specify encoding quality, or use -1 for default 
+ *			(@see PJMEDIA_CODEC_SPEEX_DEFAULT_QUALITY).
+ * @param complexity	Specify encoding complexity , or use -1 for default 
+ *			(@see PJMEDIA_CODEC_SPEEX_DEFAULT_COMPLEXITY).
+ *
+ * @return		PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pjmedia_codec_speex_set_param(unsigned clock_rate,
+						   int quality,
+						   int complexity);
+
+
+/**
+ * Unregister Speex codec factory from pjmedia endpoint and deinitialize
+ * the Speex codec library.
+ *
+ * @return	    PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pjmedia_codec_speex_deinit(void);
+
+
+PJ_END_DECL
+
+/**
+ * @}
+ */
+
+#endif	/* __PJMEDIA_CODEC_SPEEX_H__ */
+