ref: 6a2b3b03e3a985937ef609830599572545fce77e
dir: /src/audio/auserver.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2000 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: October 2000 */
/*************************************************************************/
/* */
/* A client/server audio play program */
/* */
/* Server listens to a socket and play anything coming in (streaming) */
/* Client just sends (riff) headered waveform to named socket */
/* */
/*************************************************************************/
#include "cst_file.h"
#include <stdlib.h>
#include "cst_socket.h"
#include "cst_string.h"
#include "cst_wave.h"
#include "cst_file.h"
#include "cst_audio.h"
#ifndef CST_NO_SOCKETS
#ifdef _MSC_VER
#include <io.h>
#define read(fd, buffer, count) _read(fd, buffer, count)
#else
#include <unistd.h>
#endif
static int play_wave_from_socket(snd_header *header,int audiostream)
{
/* Read audio from stream and play it to audio device, converting */
/* it to pcm if required */
int num_samples;
int sample_width;
cst_audiodev *audio_device;
int q,i,n,r;
unsigned char bytes[CST_AUDIOBUFFSIZE];
short shorts[CST_AUDIOBUFFSIZE];
#ifdef DEBUG
cst_file fff;
fff = cst_fopen("/tmp/awb.wav",CST_OPEN_WRITE|CST_OPEN_BINARY);
#endif
if ((audio_device = audio_open(header->sample_rate,1,
(header->encoding == CST_SND_SHORT) ?
CST_AUDIO_LINEAR16 : CST_AUDIO_LINEAR8)) == NULL)
{
cst_errmsg("play_wave_from_socket: can't open audio device\n");
return -1;
}
if (header->encoding == CST_SND_SHORT)
sample_width = 2;
else
sample_width = 1;
num_samples = header->data_size / sample_width;
/* we naively let the num_channels sort itself out */
for (i=0; i < num_samples; i += r/2)
{
if (num_samples > i+CST_AUDIOBUFFSIZE)
n = CST_AUDIOBUFFSIZE;
else
n = num_samples-i;
if (header->encoding == CST_SND_ULAW)
{
r = read(audiostream,bytes,n);
for (q=0; q<r; q++)
shorts[q] = cst_ulaw_to_short(bytes[q]);
r *= 2;
}
else /* if (header->encoding == CST_SND_SHORT) */
{
r = read(audiostream,shorts,n*2);
if (CST_LITTLE_ENDIAN)
for (q=0; q<r/2; q++)
shorts[q] = SWAPSHORT(shorts[q]);
}
if (r <= 0)
{ /* I'm not getting any data from the server */
audio_close(audio_device);
return CST_ERROR_FORMAT;
}
for (q=r; q > 0; q-=n)
{
n = audio_write(audio_device,shorts,q);
#ifdef DEBUG
cst_fwrite(fff,shorts,2,q);
#endif
if (n <= 0)
{
audio_close(audio_device);
return CST_ERROR_FORMAT;
}
}
}
audio_close(audio_device);
#ifdef DEBUG
cst_fclose(fff);
#endif
return CST_OK_FORMAT;
}
static int auserver_process_client(int client_name, int fd)
{
/* Gets called for each client */
snd_header header;
int r;
printf("client %d connected, ",client_name);
fflush(stdout);
/* Get header */
r = read(fd,&header,sizeof(header));
if (r != sizeof(header))
{
cst_errmsg("socket: connection didn't give a header\n");
return -1;
}
if (CST_LITTLE_ENDIAN)
{
header.magic = SWAPINT(header.magic);
header.hdr_size = SWAPINT(header.hdr_size);
header.data_size = SWAPINT(header.data_size);
header.encoding = SWAPINT(header.encoding);
header.sample_rate = SWAPINT(header.sample_rate);
header.channels = SWAPINT(header.channels);
}
if (header.magic != CST_SND_MAGIC)
{
cst_errmsg("socket: client something other than snd waveform\n");
return -1;
}
printf("%d bytes at %d rate, ", header.data_size, header.sample_rate);
fflush(stdout);
if (play_wave_from_socket(&header,fd) == CST_OK_FORMAT)
printf("successful\n");
else
printf("unsuccessful\n");
return 0;
}
int auserver(int port)
{
return cst_socket_server("audio",port,auserver_process_client);
}
#endif