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/*
alib: audio output for HP-UX using alib
copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
see COPYING and AUTHORS files in distribution or http://mpg123.org
initially written by Erwan Ducroquet
based on source code from HP (Audio SDK)
*/
/*
*
* for mpg123 :
* hpux:
* $(MAKE) \
* CC=cc \
* LDFLAGS=-L/opt/audio/lib \
* AUDIO_LIB=-lAlib \
* OBJECTS=decode.o dct64.o \
* CFLAGS=-Ae +O3 -DREAL_IS_FLOAT -D_HPUX_SOURCE -DHPUX -I/opt/audio/include \
* mpg123
*/
/*
* For the user :
* If you launch mpg123 on a XTerm with sound capabilities, it's OK
* Else, you have to set the environment variable "AUDIO" to the name of
* an HP Xterm with sound card.
*/
/**************************************************************************/
#include "mpg123app.h"
#include <fcntl.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <errno.h>
#include <Alib.h> /* /opt/audio/include */
#include <CUlib.h> /* /opt/audio/include */
#include "debug.h"
/**************************************************************************/
/* FIXME: These globals should be moved into a structure */
static Audio *audioServer = (Audio *) NULL;
static struct protoent *tcpProtocolEntry;
static ATransID xid;
static void printAudioError(Audio *audio,char *message,int errorCode) {
char errorbuff[132];
AGetErrorText(audio, errorCode, errorbuff, 131);
error2("%s: %s", message, errorbuff);
}
static long myHandler(Audio *audio,AErrorEvent *err_event) {
printAudioError( audio, "Audio error", err_event->error_code );
/* we cannot just do random exists, that messes terminal up
need proper error propagation in that case for future, setting intflag or such */
/* exit(1); */
}
/**************************************************************************/
/*
* Set the fn element of ai
* Use ao->rate and ao->channels
* Doesn't set any volume
*/
/* return on error leaves stuff dirty here... */
static int open_alib(audio_output_t *ao)
{
AudioAttributes Attribs;
AudioAttrMask AttribsMask;
AGainEntry gainEntry[4];
SSPlayParams playParams;
SStream audioStream;
AErrorHandler prevHandler;
char server[1];
int i;
long status;
if (audioServer) {
error("openAudio: audio already open");
return -1;
}
prevHandler = ASetErrorHandler(myHandler);
server[0] = '\0';
audioServer = AOpenAudio( server, NULL );
if (audioServer==NULL) {
error("Error: could not open audio\n");
return -1;
}
ao->fn = socket( AF_INET, SOCK_STREAM, 0 );
if(ao->fn<0) {
error("Socket creation failed");
return -1;
}
Attribs.type = ATSampled;
Attribs.attr.sampled_attr.sampling_rate = ao->rate;
Attribs.attr.sampled_attr.channels = ao->channels;
Attribs.attr.sampled_attr.data_format = ADFLin16;
AttribsMask = ASSamplingRateMask | ASChannelsMask | ASDataFormatMask;
gainEntry[0].gain = AUnityGain;
gainEntry[0].u.o.out_ch = AOCTMono;
gainEntry[0].u.o.out_dst = AODTDefaultOutput;
playParams.gain_matrix.type = AGMTOutput; /* gain matrix */
playParams.gain_matrix.num_entries = 1;
playParams.gain_matrix.gain_entries = gainEntry;
playParams.play_volume = AUnityGain; /* play volume */
playParams.priority = APriorityNormal; /* normal priority */
playParams.event_mask = 0; /* don't solicit any events */
xid=APlaySStream(audioServer,AttribsMask,&Attribs,
&playParams,&audioStream,NULL);
status=connect(ao->fn,
(struct sockaddr *) &audioStream.tcp_sockaddr,
sizeof(struct sockaddr_in) );
if (status<0) {
error("Connect failed");
return -1;
}
i=-1;
tcpProtocolEntry=getprotobyname("tcp");
setsockopt(ao->fn,tcpProtocolEntry->p_proto,TCP_NODELAY,&i,sizeof(i));
return ao->fn;
}
/**************************************************************************/
static int close_alib(audio_output_t *ao)
{
close(ao->fn);
ASetCloseDownMode( audioServer, AKeepTransactions, NULL );
ACloseAudio( audioServer, NULL );
audioServer = (Audio *) NULL;
return 0;
}
/**************************************************************************/
/*
* very simple
* deserv to be inline
*/
static int write_alib(audio_output_t *ao,unsigned char *buf,int len)
{
return write(ao->fn,buf,len*2);
}
/**************************************************************************/
static int get_formats_alib(audio_output_t *ao)
{
return MPG123_ENC_SIGNED_16;
}
static void flush_alib(audio_output_t *ao)
{
}
static int init_alib(audio_output_t* ao)
{
if (ao==NULL) return -1;
/* Set callbacks */
ao->open = open_alib;
ao->flush = flush_alib;
ao->write = write_alib;
ao->get_formats = get_formats_alib;
ao->close = close_alib;
/* Success */
return 0;
}
/*
Module information data structure
*/
mpg123_module_t mpg123_output_module_info = {
/* api_version */ MPG123_MODULE_API_VERSION,
/* name */ "alib",
/* description */ "Output audio HP-UX using alib.",
/* revision */ "$Rev:$",
/* handle */ NULL,
/* init_output */ init_alib,
};
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