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add speex 1.2beta1 to in tree libs
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3759 d0543943-73ff-0310-b7d9-9358b9ac24b2
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Michael Jerris committed
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@@ -0,0 +1,263 @@
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/* Copyright (C) 2002 Jean-Marc Valin
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File: wav_io.c
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Routines to handle wav (RIFF) headers
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include "speex/speex_types.h"
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static spx_uint32_t le_int(spx_uint32_t i)
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{
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spx_uint32_t ret=i;
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#ifdef WORDS_BIGENDIAN
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ret = i>>24;
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ret += (i>>8)&0x0000ff00;
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ret += (i<<8)&0x00ff0000;
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ret += (i<<24);
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#endif
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return ret;
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}
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unsigned short be_short(unsigned short s)
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{
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unsigned short ret=s;
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#ifndef WORDS_BIGENDIAN
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ret = s>>8;
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ret += s<<8;
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#endif
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return ret;
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}
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unsigned short le_short(unsigned short s)
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{
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unsigned short ret=s;
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#ifdef WORDS_BIGENDIAN
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ret = s>>8;
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ret += s<<8;
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#endif
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return ret;
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}
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int read_wav_header(FILE *file, int *rate, int *channels, int *format, spx_int32_t *size)
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{
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char ch[5];
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spx_int32_t itmp;
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spx_int16_t stmp;
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spx_int32_t bpersec;
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spx_int16_t balign;
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int skip_bytes;
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int i;
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ch[4]=0;
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#if 0
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fread(ch, 1, 4, file);
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if (strcmp(ch, "RIFF")!=0)
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{
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fseek(file, 0, SEEK_SET);
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return 0;
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}
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fread(&itmp, 4, 1, file);
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*size = le_int(itmp-36);
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fread(ch, 1, 4, file);
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if (strcmp(ch, "WAVE")!=0)
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{
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fprintf (stderr, "RIFF file is not a WAVE file\n");
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return -1;
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}
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#endif
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fread(ch, 1, 4, file);
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while (strcmp(ch, "fmt ")!=0)
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{
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fread(&itmp, 4, 1, file);
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itmp = le_int(itmp);
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/*fprintf (stderr, "skip=%d\n", itmp);*/
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/*strange way of seeking, but it works even for pipes*/
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for (i=0;i<itmp;i++)
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fgetc(file);
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/*fseek(file, itmp, SEEK_CUR);*/
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fread(ch, 1, 4, file);
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if (feof(file))
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{
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fprintf (stderr, "Corrupted WAVE file: no \"fmt \"\n");
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return -1;
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}
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}
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/*if (strcmp(ch, "fmt ")!=0)
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{
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fprintf (stderr, "Corrupted WAVE file: no \"fmt \"\n");
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return -1;
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}*/
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fread(&itmp, 4, 1, file);
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itmp = le_int(itmp);
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skip_bytes=itmp-16;
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/*fprintf (stderr, "skip=%d\n", skip_bytes);*/
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fread(&stmp, 2, 1, file);
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stmp = le_short(stmp);
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if (stmp!=1)
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{
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fprintf (stderr, "Only PCM encoding is supported\n");
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return -1;
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}
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fread(&stmp, 2, 1, file);
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stmp = le_short(stmp);
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*channels = stmp;
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if (stmp>2)
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{
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fprintf (stderr, "Only mono and (intensity) stereo supported\n");
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return -1;
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}
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fread(&itmp, 4, 1, file);
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itmp = le_int(itmp);
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*rate = itmp;
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if (*rate != 8000 && *rate != 16000 && *rate != 11025 && *rate != 22050 && *rate != 32000 && *rate != 44100 && *rate != 48000)
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{
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fprintf (stderr, "Only 8 kHz (narrowband) and 16 kHz (wideband) supported (plus 11.025 kHz and 22.05 kHz, but your mileage may vary)\n");
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return -1;
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}
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fread(&itmp, 4, 1, file);
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bpersec = le_int(itmp);
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fread(&stmp, 2, 1, file);
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balign = le_short(stmp);
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fread(&stmp, 2, 1, file);
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stmp = le_short(stmp);
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if (stmp!=16 && stmp!=8)
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{
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fprintf (stderr, "Only 8/16-bit linear supported\n");
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return -1;
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}
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*format=stmp;
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if (bpersec!=*rate**channels*stmp/8)
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{
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fprintf (stderr, "Corrupted header: ByteRate mismatch\n");
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return -1;
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}
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if (balign!=*channels*stmp/8)
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{
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fprintf (stderr, "Corrupted header: BlockAlign mismatch\n");
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return -1;
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}
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/*strange way of seeking, but it works even for pipes*/
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if (skip_bytes>0)
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for (i=0;i<skip_bytes;i++)
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fgetc(file);
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/*fseek(file, skip_bytes, SEEK_CUR);*/
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fread(ch, 1, 4, file);
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while (strcmp(ch, "data")!=0)
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{
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fread(&itmp, 4, 1, file);
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itmp = le_int(itmp);
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/*strange way of seeking, but it works even for pipes*/
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for (i=0;i<itmp;i++)
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fgetc(file);
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/*fseek(file, itmp, SEEK_CUR);*/
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fread(ch, 1, 4, file);
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if (feof(file))
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{
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fprintf (stderr, "Corrupted WAVE file: no \"data\"\n");
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return -1;
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}
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}
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/*Ignore this for now*/
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fread(&itmp, 4, 1, file);
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itmp = le_int(itmp);
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*size=itmp;
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return 1;
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}
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void write_wav_header(FILE *file, int rate, int channels, int format, int size)
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{
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char ch[5];
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spx_int32_t itmp;
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spx_int16_t stmp;
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ch[4]=0;
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fprintf (file, "RIFF");
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itmp = 0x7fffffff;
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fwrite(&itmp, 4, 1, file);
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fprintf (file, "WAVEfmt ");
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itmp = le_int(16);
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fwrite(&itmp, 4, 1, file);
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stmp = le_short(1);
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fwrite(&stmp, 2, 1, file);
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stmp = le_short(channels);
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fwrite(&stmp, 2, 1, file);
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itmp = le_int(rate);
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fwrite(&itmp, 4, 1, file);
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itmp = le_int(rate*channels*2);
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fwrite(&itmp, 4, 1, file);
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stmp = le_short(2*channels);
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fwrite(&stmp, 2, 1, file);
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stmp = le_short(16);
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fwrite(&stmp, 2, 1, file);
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fprintf (file, "data");
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itmp = le_int(0x7fffffff);
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fwrite(&itmp, 4, 1, file);
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}
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