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85 lines
2.7 KiB
85 lines
2.7 KiB
15 years ago
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/*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef MSILBCENCODER_H
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#define MSILBCENCODER_H
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#include "mscodec.h"
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#include <iLBC_encode.h>
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#define ILBC_BITS_IN_COMPRESSED_FRAME 400
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int
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ilbc_read_16bit_samples(gint16 int16samples[], float speech[], int n);
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int
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ilbc_write_16bit_samples(gint16 int16samples[], float speech[], int n);
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void
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ilbc_write_bits(unsigned char *data, unsigned char *bits, int nbytes);
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int
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ilbc_read_bits(unsigned char *data, unsigned char *bits, int nbytes);
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/*this is the class that implements a ILBCencoder filter*/
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#define MSILBCENCODER_MAX_INPUTS 1 /* max output per filter*/
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typedef struct _MSILBCEncoder
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{
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/* the MSILBCEncoder derivates from MSFilter, so the MSFilter object MUST be the first of the MSILBCEncoder 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[MSILBCENCODER_MAX_INPUTS];
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MSQueue *q_outputs[MSILBCENCODER_MAX_INPUTS];
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iLBC_Enc_Inst_t ilbc_enc;
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int ilbc_encoded_bytes;
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int bitrate;
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int ms_per_frame;
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int samples_per_frame;
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int bytes_per_compressed_frame;
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} MSILBCEncoder;
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typedef struct _MSILBCEncoderClass
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{
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/* the MSILBCEncoder derivates from MSFilter, so the MSFilter class MUST be the first of the MSILBCEncoder class
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in order to the class mechanism to work*/
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MSFilterClass parent_class;
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} MSILBCEncoderClass;
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/* PUBLIC */
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#define MS_ILBCENCODER(filter) ((MSILBCEncoder*)(filter))
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#define MS_ILBCENCODER_CLASS(klass) ((MSILBCEncoderClass*)(klass))
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MSFilter * ms_ilbc_encoder_new(void);
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/* FOR INTERNAL USE*/
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void ms_ilbc_encoder_init(MSILBCEncoder *r);
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void ms_ilbc_encoder_class_init(MSILBCEncoderClass *klass);
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void ms_ilbc_encoder_destroy( MSILBCEncoder *obj);
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void ms_ilbc_encoder_process(MSILBCEncoder *r);
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#define ILBC_MAX_BYTES_PER_COMPRESSED_FRAME NO_OF_BYTES_30MS
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#define ILBC_MAX_SAMPLES_PER_FRAME BLOCKL_30MS
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#endif
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