#ifndef ESD_H
#define ESD_H
#include <audiofile.h>
#ifdef __cplusplus
extern "C" {
#endif
/* path and name of the default EsounD domain socket */
#define ESD_UNIX_SOCKET_DIR esd_get_socket_dirname()
#define ESD_UNIX_SOCKET_NAME esd_get_socket_name()
/* size of the audio buffer */
#define ESD_BUF_SIZE (4 * 1024)
/* maximum size we can write(). Otherwise we might overflow */
#define ESD_MAX_WRITE_SIZE (21 * 4096)
/* length of the authorization key, octets */
#define ESD_KEY_LEN (16)
/* default port for the EsounD server */
#define ESD_DEFAULT_PORT (16001)
/* default sample rate for the EsounD server */
#define ESD_DEFAULT_RATE (44100)
/* maximum length of a stream/sample name */
#define ESD_NAME_MAX (128)
/* a magic number to identify the relative endianness of a client */
#define ESD_ENDIAN_KEY \
( (unsigned int) ( ('E' << 24) + ('N' << 16) + ('D' << 8) + ('N') ) )
#define ESD_VOLUME_BASE (256)
/*************************************/
/* what can we do to/with the EsounD */
enum esd_proto {
ESD_PROTO_CONNECT, /* implied on inital client connection */
/* pseudo "security" functionality */
ESD_PROTO_LOCK, /* disable "foreign" client connections */
ESD_PROTO_UNLOCK, /* enable "foreign" client connections */
/* stream functionality: play, record, monitor */
ESD_PROTO_STREAM_PLAY, /* play all following data as a stream */
ESD_PROTO_STREAM_REC, /* record data from card as a stream */
ESD_PROTO_STREAM_MON, /* send mixed buffer output as a stream */
/* sample functionality: cache, free, play, loop, EOL, kill */
ESD_PROTO_SAMPLE_CACHE, /* cache a sample in the server */
ESD_PROTO_SAMPLE_FREE, /* release a sample in the server */
ESD_PROTO_SAMPLE_PLAY, /* play a cached sample */
ESD_PROTO_SAMPLE_LOOP, /* loop a cached sample, til eoloop */
ESD_PROTO_SAMPLE_STOP, /* stop a looping sample when done */
ESD_PROTO_SAMPLE_KILL, /* stop the looping sample immed. */
/* free and reclaim /dev/dsp functionality */
ESD_PROTO_STANDBY, /* release /dev/dsp and ignore all data */
ESD_PROTO_RESUME, /* reclaim /dev/dsp and play sounds again */
/* TODO: move these to a more logical place. NOTE: will break the protocol */
ESD_PROTO_SAMPLE_GETID, /* get the ID for an already-cached sample */
ESD_PROTO_STREAM_FILT, /* filter mixed buffer output as a stream */
/* esd remote management */
ESD_PROTO_SERVER_INFO, /* get server info (ver, sample rate, format) */
ESD_PROTO_ALL_INFO, /* get all info (server info, players, samples) */
ESD_PROTO_SUBSCRIBE, /* track new and removed players and samples */
ESD_PROTO_UNSUBSCRIBE, /* stop tracking updates */
/* esd remote control */
ESD_PROTO_STREAM_PAN, /* set stream panning */
ESD_PROTO_SAMPLE_PAN, /* set default sample panning */
/* esd status */
ESD_PROTO_STANDBY_MODE, /* see if server is in standby, autostandby, etc */
/* esd latency */
ESD_PROTO_LATENCY, /* retrieve latency between write()'s and output */
ESD_PROTO_MAX /* for bounds checking */
};
/******************/
/* The EsounD api */
/* the properties of a sound buffer are logically or'd */
/* bits of stream/sample data */
#define ESD_MASK_BITS ( 0x000F )
#define ESD_BITS8 ( 0x0000 )
#define ESD_BITS16 ( 0x0001 )
/* how many interleaved channels of data */
#define ESD_MASK_CHAN ( 0x00F0 )
#define ESD_MONO ( 0x0010 )
#define ESD_STEREO ( 0x0020 )
/* whether it's a stream or a sample */
#define ESD_MASK_MODE ( 0x0F00 )
#define ESD_STREAM ( 0x0000 )
#define ESD_SAMPLE ( 0x0100 )
#define ESD_ADPCM ( 0x0200 ) /* TODO: anyone up for this? =P */
/* the function of the stream/sample, and common functions */
#define ESD_MASK_FUNC ( 0xF000 )
#define ESD_PLAY ( 0x1000 )
/* functions for streams only */
#define ESD_MONITOR ( 0x0000 )
#define ESD_RECORD ( 0x2000 )
/* functions for samples only */
#define ESD_STOP ( 0x0000 )
#define ESD_LOOP ( 0x2000 )
typedef int esd_format_t;
typedef int esd_proto_t;
/*******************************************************************/
/* client side API for playing sounds */
typedef unsigned char octet;
/*******************************************************************/
/* esdlib.c - basic esd client interface functions */
/* opens channel, authenticates connection, and prefares for protos */
/* returns EsounD socket for communication, result < 0 = error */
/* server = listen socket (localhost:5001, 192.168.168.0:9999 */
/* rate, format = (bits | channels | stream | func) */
int esd_open_sound( const char *host );
/* send the authorization cookie, create one if needed */
int esd_send_auth( int sock );
/* lock/unlock will disable/enable foreign clients from connecting */
int esd_lock( int esd );
int esd_unlock( int esd );
/* standby/resume will free/reclaim audio device so others may use it */
int esd_standby( int esd );
int esd_resume( int esd );
/* open a socket for playing, monitoring, or recording as a stream */
/* the *_fallback functions try to open /dev/dsp if there's no EsounD */
int esd_play_stream( esd_format_t format, int rate,
const char *host, const char *name );
int esd_play_stream_fallback( esd_format_t format, int rate,
const char *host, const char *name );
int esd_monitor_stream( esd_format_t format, int rate,
const char *host, const char *name );
/* int esd_monitor_stream_fallback( esd_format_t format, int rate ); */
int esd_record_stream( esd_format_t format, int rate,
const char *host, const char *name );
int esd_record_stream_fallback( esd_format_t format, int rate,
const char *host, const char *name );
int esd_filter_stream( esd_format_t format, int rate,
const char *host, const char *name );
/* cache a sample in the server returns sample id, < 0 = error */
int esd_sample_cache( int esd, esd_format_t format, const int rate,
const int length, const char *name );
int esd_confirm_sample_cache( int esd );
/* get the sample id for an already-cached sample */
int esd_sample_getid( int esd, const char *name);
/* uncache a sample in the server */
int esd_sample_free( int esd, int sample );
/* play a cached sample once */
int esd_sample_play( int esd, int sample );
/* make a cached sample loop */
int esd_sample_loop( int esd, int sample );
/* stop the looping sample at end */
int esd_sample_stop( int esd, int sample );
/* stop a playing sample immed. */
int esd_sample_kill( int esd, int sample );
/* closes fd, previously obtained by esd_open */
int esd_close( int esd );
/* get the stream latency to esound (latency is number of samples */
/* at 44.1khz stereo 16 bit - you'll have to adjust if oyur input */
/* sampling rate is less (in bytes per second) */
/* so if you're at 44.1khz stereo 16bit in your stream - your lag */
/* in bytes woudl be lag * 2 * 2 bytes (2 for stereo, 2 for 16bit) */
/* if your stream is at 22.05 Khz it'll be double this - in mono */
/* double again ... etc. */
int esd_get_latency(int esd);
/*******************************************************************/
/* esdmgr.c - functions to implement a "sound manager" for esd */
/* structures to retrieve information about streams/samples from the server */
typedef struct esd_server_info {
int version; /* server version encoded as an int */
esd_format_t format; /* magic int with the format info */
int rate; /* sample rate */
} esd_server_info_t;
typedef struct esd_player_info {
struct esd_player_info *next; /* point to next entry in list */
esd_server_info_t *server; /* the server that contains this stream */
int source_id; /* either a stream fd or sample id */
char name[ ESD_NAME_MAX ]; /* name of stream for remote control */
int rate; /* sample rate */
int left_vol_scale; /* volume scaling */
int right_vol_scale;
esd_format_t format; /* magic int with the format info */
} esd_player_info_t;
typedef struct esd_sample_info {
struct esd_sample_info *next; /* point to next entry in list */
esd_server_info_t *server; /* the server that contains this sample */
int sample_id; /* either a stream fd or sample id */
char name[ ESD_NAME_MAX ]; /* name of stream for remote control */
int rate; /* sample rate */
int left_vol_scale; /* volume scaling */
int right_vol_scale;
esd_format_t format; /* magic int with the format info */
int length; /* total buffer length */
} esd_sample_info_t;
typedef struct esd_info {
esd_server_info_t *server;
esd_player_info_t *player_list;
esd_sample_info_t *sample_list;
} esd_info_t;
enum esd_standby_mode {
ESM_ERROR, ESM_ON_STANDBY, ESM_ON_AUTOSTANDBY, ESM_RUNNING
};
typedef int esd_standby_mode_t;
/* define callbacks for esd_update_info() */
/* what to do when a stream connects, or sample is played */
typedef int esd_new_player_callback_t( esd_player_info_t * );
/* what to do when a stream disconnects, or sample stops playing */
typedef int esd_old_player_callback_t( esd_player_info_t * );
/* what to do when a sample is cached */
typedef int esd_new_sample_callback_t( esd_sample_info_t * );
/* what to do when a sample is uncached */
typedef int esd_old_sample_callback_t( esd_sample_info_t * );
typedef struct esd_update_info_callbacks {
esd_new_player_callback_t *esd_new_player_callback;
esd_old_player_callback_t *esd_old_player_callback;
esd_new_sample_callback_t *esd_new_sample_callback;
esd_old_sample_callback_t *esd_old_sample_callback;
} esd_update_info_callbacks_t;
/* print server into to stdout */
void esd_print_server_info( esd_server_info_t *server_info );
void esd_print_player_info( esd_player_info_t *player_info );
void esd_print_sample_info( esd_sample_info_t *sample_info );
/* print all info to stdout */
void esd_print_all_info( esd_info_t *all_info );
/* retrieve server properties (sample rate, format, version number) */
esd_server_info_t *esd_get_server_info( int esd );
/* release all memory allocated for the server properties structure */
void esd_free_server_info( esd_server_info_t *server_info );
/* retrieve all information from server */
esd_info_t *esd_get_all_info( int esd );
/* retrieve all information from server, and update until unsubsribed or closed */
esd_info_t *esd_subscribe_all_info( int esd );
/* call to update the info structure with new information, and call callbacks */
esd_info_t *esd_update_info( int esd, esd_info_t *info,
esd_update_info_callbacks_t *callbacks );
esd_info_t *esd_unsubscribe_info( int esd );
/* release all memory allocated for the esd info structure */
void esd_free_all_info( esd_info_t *info );
/* reset the volume panning for a stream */
int esd_set_stream_pan( int esd, int stream_id,
int left_scale, int right_scale );
/* reset the default volume panning for a sample */
int esd_set_default_sample_pan( int esd, int sample_id,
int left_scale, int right_scale );
/* see if the server is in stnaby, autostandby, etc */
esd_standby_mode_t esd_get_standby_mode( int esd );
/*******************************************************************/
/* esdfile.c - audiofile wrappers for sane handling of files */
int esd_send_file( int esd, AFfilehandle au_file, int frame_length );
int esd_play_file( const char *name_prefix, const char *filename, int fallback );
int esd_file_cache( int esd, const char *name_prefix, const char *filename );
/*******************************************************************/
/* audio.c - abstract the sound hardware for cross platform usage */
extern esd_format_t esd_audio_format;
extern int esd_audio_rate;
extern char *esd_audio_device;
const char *esd_audio_devices( void );
int esd_audio_open( void );
void esd_audio_close( void );
void esd_audio_pause( void );
int esd_audio_write( void *buffer, int buf_size );
int esd_audio_read( void *buffer, int buf_size );
void esd_audio_flush( void );
/******************************************************************/
/* util.c utilities */
const char *esd_get_socket_dirname( void );
const char *esd_get_socket_name( void );
int have_ipv6( void );
#ifdef __cplusplus
}
#endif
#endif /* #ifndef ESD_H */