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75 lines
4.4 KiB
75 lines
4.4 KiB
/*
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encoder.h
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Copyright (C) 2011 Belledonne Communications, Grenoble, France
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Author : Johan Pascal
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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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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 ENCODER_H
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#define ENCODER_H
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#include <stdint.h>
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typedef struct bcg729EncoderChannelContextStruct_struct bcg729EncoderChannelContextStruct;
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#ifdef _WIN32
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#define BCG729_VISIBILITY
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#else
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#define BCG729_VISIBILITY __attribute__ ((visibility ("default")))
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#endif
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/*****************************************************************************/
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/* initBcg729EncoderChannel : create context structure and initialise it */
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/* parameters: */
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/* -(i) enanbleVAD : flag set to 1: VAD/DTX is enabled */
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/* return value : */
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/* - the encoder channel context data */
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/* */
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/*****************************************************************************/
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BCG729_VISIBILITY bcg729EncoderChannelContextStruct *initBcg729EncoderChannel(uint8_t enableVAD);
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/*****************************************************************************/
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/* closeBcg729EncoderChannel : free memory of context structure */
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/* parameters: */
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/* -(i) encoderChannelContext : the channel context data */
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/* */
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/*****************************************************************************/
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BCG729_VISIBILITY void closeBcg729EncoderChannel(bcg729EncoderChannelContextStruct *encoderChannelContext);
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/*****************************************************************************/
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/* bcg729Encoder : */
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/* parameters: */
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/* -(i) encoderChannelContext : context for this encoder channel */
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/* -(i) inputFrame : 80 samples (16 bits PCM) */
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/* -(o) bitStream : The 15 parameters for a frame on 80 bits */
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/* on 80 bits (5 16bits words) for voice frame, 4 on 2 byte for */
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/* noise frame, 0 for untransmitted frames */
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/* -(o) bitStreamLength : actual length of output, may be 0, 2 or 10 */
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/* if VAD/DTX is enabled */
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/* */
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/*****************************************************************************/
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BCG729_VISIBILITY void bcg729Encoder(bcg729EncoderChannelContextStruct *encoderChannelContext, int16_t inputFrame[], uint8_t bitStream[], uint8_t *bitStreamLength);
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/*****************************************************************************/
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/* bcg729GetRFC3389Payload : return the comfort noise payload according to */
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/* RFC3389 for the last CN frame generated by encoder */
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/* */
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/* parameters: */
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/* -(i) encoderChannelContext : retrieve the last CN frame encoded */
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/* using this context */
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/* -(o) payload : 11 parameters following RFC3389 with filter order 10 */
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/* */
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/*****************************************************************************/
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BCG729_VISIBILITY void bcg729GetRFC3389Payload(bcg729EncoderChannelContextStruct *encoderChannelContext, uint8_t payload[]);
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#endif /* ifndef ENCODER_H */
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