1 #ifndef fooesoundhfoo 2 #define fooesoundhfoo 3 4 /*** 5 This file is part of PulseAudio. 6 7 Copyright 2004-2006 Lennart Poettering 8 9 PulseAudio is free software; you can redistribute it and/or modify 10 it under the terms of the GNU Lesser General Public License as published 11 by the Free Software Foundation; either version 2.1 of the License, 12 or (at your option) any later version. 13 14 PulseAudio is distributed in the hope that it will be useful, but 15 WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 General Public License for more details. 18 19 You should have received a copy of the GNU Lesser General Public License 20 along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. 21 ***/ 22 23 /* Most of the following is blatantly stolen from esound. */ 24 25 /* path and name of the default EsounD domain socket */ 26 #define ESD_UNIX_SOCKET_DIR "/tmp/.esd" 27 #define ESD_UNIX_SOCKET_NAME "/tmp/.esd/socket" 28 29 /* length of the audio buffer size */ 30 #define ESD_BUF_SIZE (4 * 1024) 31 /* maximum size we can write(). Otherwise we might overflow */ 32 #define ESD_MAX_WRITE_SIZE (21 * 4096) 33 34 /* length of the authentication key, octets */ 35 #define ESD_KEY_LEN (16) 36 37 /* default port for the EsounD server */ 38 #define ESD_DEFAULT_PORT (16001) 39 40 /* default sample rate for the EsounD server */ 41 #define ESD_DEFAULT_RATE (44100) 42 43 /* maximum length of a stream/sample name */ 44 #define ESD_NAME_MAX (128) 45 46 /* a magic number to identify the relative endianness of a client */ 47 #define ESD_ENDIAN_KEY ((uint32_t) (('E' << 24) + ('N' << 16) + ('D' << 8) + ('N'))) 48 49 #define ESD_VOLUME_BASE (256) 50 51 /*************************************/ 52 /* what can we do to/with the EsounD */ 53 enum esd_proto { 54 ESD_PROTO_CONNECT, /* implied on initial client connection */ 55 56 /* pseudo "security" functionality */ 57 ESD_PROTO_LOCK, /* disable "foreign" client connections */ 58 ESD_PROTO_UNLOCK, /* enable "foreign" client connections */ 59 60 /* stream functionality: play, record, monitor */ 61 ESD_PROTO_STREAM_PLAY, /* play all following data as a stream */ 62 ESD_PROTO_STREAM_REC, /* record data from card as a stream */ 63 ESD_PROTO_STREAM_MON, /* send mixed buffer output as a stream */ 64 65 /* sample functionality: cache, free, play, loop, EOL, kill */ 66 ESD_PROTO_SAMPLE_CACHE, /* cache a sample in the server */ 67 ESD_PROTO_SAMPLE_FREE, /* release a sample in the server */ 68 ESD_PROTO_SAMPLE_PLAY, /* play a cached sample */ 69 ESD_PROTO_SAMPLE_LOOP, /* loop a cached sample, til eoloop */ 70 ESD_PROTO_SAMPLE_STOP, /* stop a looping sample when done */ 71 ESD_PROTO_SAMPLE_KILL, /* stop the looping sample immediately */ 72 73 /* free and reclaim /dev/dsp functionality */ 74 ESD_PROTO_STANDBY, /* release /dev/dsp and ignore all data */ 75 ESD_PROTO_RESUME, /* reclaim /dev/dsp and play sounds again */ 76 77 /* TODO: move these to a more logical place. NOTE: will break the protocol */ 78 ESD_PROTO_SAMPLE_GETID, /* get the ID for an already-cached sample */ 79 ESD_PROTO_STREAM_FILT, /* filter mixed buffer output as a stream */ 80 81 /* esd remote management */ 82 ESD_PROTO_SERVER_INFO, /* get server info (ver, sample rate, format) */ 83 ESD_PROTO_ALL_INFO, /* get all info (server info, players, samples) */ 84 ESD_PROTO_SUBSCRIBE, /* track new and removed players and samples */ 85 ESD_PROTO_UNSUBSCRIBE, /* stop tracking updates */ 86 87 /* esd remote control */ 88 ESD_PROTO_STREAM_PAN, /* set stream panning */ 89 ESD_PROTO_SAMPLE_PAN, /* set default sample panning */ 90 91 /* esd status */ 92 ESD_PROTO_STANDBY_MODE, /* see if server is in standby, autostandby, etc */ 93 94 /* esd latency */ 95 ESD_PROTO_LATENCY, /* retrieve latency between write()'s and output */ 96 97 ESD_PROTO_MAX /* for bounds checking */ 98 }; 99 100 /******************/ 101 /* The EsounD api */ 102 103 /* the properties of a sound buffer are logically or'd */ 104 105 /* bits of stream/sample data */ 106 #define ESD_MASK_BITS ( 0x000F ) 107 #define ESD_BITS8 ( 0x0000 ) 108 #define ESD_BITS16 ( 0x0001 ) 109 110 /* how many interleaved channels of data */ 111 #define ESD_MASK_CHAN ( 0x00F0 ) 112 #define ESD_MONO ( 0x0010 ) 113 #define ESD_STEREO ( 0x0020 ) 114 115 /* whether it's a stream or a sample */ 116 #define ESD_MASK_MODE ( 0x0F00 ) 117 #define ESD_STREAM ( 0x0000 ) 118 #define ESD_SAMPLE ( 0x0100 ) 119 #define ESD_ADPCM ( 0x0200 ) /* TODO: anyone up for this? =P */ 120 121 /* the function of the stream/sample, and common functions */ 122 #define ESD_MASK_FUNC ( 0xF000 ) 123 #define ESD_PLAY ( 0x1000 ) 124 /* functions for streams only */ 125 #define ESD_MONITOR ( 0x0000 ) 126 #define ESD_RECORD ( 0x2000 ) 127 /* functions for samples only */ 128 #define ESD_STOP ( 0x0000 ) 129 #define ESD_LOOP ( 0x2000 ) 130 131 typedef int esd_format_t; 132 typedef int esd_proto_t; 133 134 /*******************************************************************/ 135 /* esdmgr.c - functions to implement a "sound manager" for esd */ 136 137 /* structures to retrieve information about streams/samples from the server */ 138 typedef struct esd_server_info { 139 140 int version; /* server version encoded as an int */ 141 esd_format_t format; /* magic int with the format info */ 142 int rate; /* sample rate */ 143 144 } esd_server_info_t; 145 146 typedef struct esd_player_info { 147 148 struct esd_player_info *next; /* point to next entry in list */ 149 esd_server_info_t *server; /* the server that contains this stream */ 150 151 int source_id; /* either a stream fd or sample id */ 152 char name[ ESD_NAME_MAX ]; /* name of stream for remote control */ 153 int rate; /* sample rate */ 154 int left_vol_scale; /* volume scaling */ 155 int right_vol_scale; 156 157 esd_format_t format; /* magic int with the format info */ 158 159 } esd_player_info_t; 160 161 typedef struct esd_sample_info { 162 163 struct esd_sample_info *next; /* point to next entry in list */ 164 esd_server_info_t *server; /* the server that contains this sample */ 165 166 int sample_id; /* either a stream fd or sample id */ 167 char name[ ESD_NAME_MAX ]; /* name of stream for remote control */ 168 int rate; /* sample rate */ 169 int left_vol_scale; /* volume scaling */ 170 int right_vol_scale; 171 172 esd_format_t format; /* magic int with the format info */ 173 int length; /* total buffer length */ 174 175 } esd_sample_info_t; 176 177 typedef struct esd_info { 178 179 esd_server_info_t *server; 180 esd_player_info_t *player_list; 181 esd_sample_info_t *sample_list; 182 183 } esd_info_t; 184 185 enum esd_standby_mode { 186 ESM_ERROR, ESM_ON_STANDBY, ESM_ON_AUTOSTANDBY, ESM_RUNNING 187 }; 188 typedef int esd_standby_mode_t; 189 190 enum esd_client_state { 191 ESD_STREAMING_DATA, /* data from here on is streamed data */ 192 ESD_CACHING_SAMPLE, /* midway through caching a sample */ 193 ESD_NEEDS_REQDATA, /* more data needed to complete request */ 194 ESD_NEXT_REQUEST, /* proceed to next request */ 195 ESD_CLIENT_STATE_MAX /* place holder */ 196 }; 197 typedef int esd_client_state_t; 198 199 /* the endian key is transferred in binary, if it's read into int, */ 200 /* and matches ESD_ENDIAN_KEY (ENDN), then the endianness of the */ 201 /* server and the client match; if it's SWAP_ENDIAN_KEY, swap data */ 202 #define ESD_SWAP_ENDIAN_KEY (PA_UINT32_SWAP(ESD_ENDIAN_KEY)) 203 204 #endif 205