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65 lines
2.2 KiB
65 lines
2.2 KiB
/*
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The mediastreamer library aims at providing modular media processing and I/O
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for linphone, but also for any telephony application.
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Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef MSALAWENCODER_H
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#define MSALAWENCODER_H
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#include "mscodec.h"
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/*this is the class that implements a ALAWencoder filter*/
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#define MSALAWENCODER_MAX_INPUTS 1 /* max output per filter*/
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typedef struct _MSALAWEncoder
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{
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/* the MSALAWEncoder derivates from MSFilter, so the MSFilter object MUST be the first of the MSALAWEncoder object
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in order to the object mechanism to work*/
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MSFilter filter;
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MSFifo *f_inputs[MSALAWENCODER_MAX_INPUTS];
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MSFifo *f_outputs[MSALAWENCODER_MAX_INPUTS];
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} MSALAWEncoder;
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typedef struct _MSALAWEncoderClass
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{
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/* the MSALAWEncoder derivates from MSFilter, so the MSFilter class MUST be the first of the MSALAWEncoder class
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in order to the class mechanism to work*/
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MSFilterClass parent_class;
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} MSALAWEncoderClass;
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/* PUBLIC */
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#define MS_ALAWENCODER(filter) ((MSALAWEncoder*)(filter))
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#define MS_ALAWENCODER_CLASS(klass) ((MSALAWEncoderClass*)(klass))
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MSFilter * ms_ALAWencoder_new(void);
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/* FOR INTERNAL USE*/
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void ms_ALAWencoder_init(MSALAWEncoder *r);
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void ms_ALAWencoder_class_init(MSALAWEncoderClass *klass);
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void ms_ALAWencoder_destroy( MSALAWEncoder *obj);
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void ms_ALAWencoder_process(MSALAWEncoder *r);
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/* tuning parameters :*/
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#define ALAW_ENCODER_WMAXGRAN 160
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#define ALAW_ENCODER_RMAXGRAN 320
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#endif
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