home *** CD-ROM | disk | FTP | other *** search
- #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)
-
- /* 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 */
-