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#ifndef fooesoundhfoo
#define fooesoundhfoo
/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
/* Most of the following is blatantly stolen from esound. */
/* path and name of the default EsounD domain socket */
#define ESD_UNIX_SOCKET_DIR "/tmp/.esd"
#define ESD_UNIX_SOCKET_NAME "/tmp/.esd/socket"
/* length of the audio buffer size */
#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 ((uint32_t) (('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;
/*******************************************************************/
/* 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;
enum esd_client_state {
ESD_STREAMING_DATA, /* data from here on is streamed data */
ESD_CACHING_SAMPLE, /* midway through caching a sample */
ESD_NEEDS_REQDATA, /* more data needed to complere request */
ESD_NEXT_REQUEST, /* proceed to next request */
ESD_CLIENT_STATE_MAX /* place holder */
};
typedef int esd_client_state_t;
/* switch endian order for cross platform playing */
#define swap_endian_32(x) ((x >> 24) | ((x >> 8) & 0xFF00) | (((x & 0xFF00) << 8)) | (x << 24))
#define maybe_swap_endian_32(c,x) ((c) ? swap_endian_32(x) : x)
/* the endian key is transferred in binary, if it's read into int, */
/* and matches ESD_ENDIAN_KEY (ENDN), then the endianness of the */
/* server and the client match; if it's SWAP_ENDIAN_KEY, swap data */
#define ESD_SWAP_ENDIAN_KEY ((uint32_t) swap_endian_32(ESD_ENDIAN_KEY))
#endif
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