mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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41f6aea8fd
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@90 fefdeb5f-60dc-0310-8127-8f9354f1896f
213 lines
7.5 KiB
C
213 lines
7.5 KiB
C
#ifndef fooesoundhfoo
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#define fooesoundhfoo
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/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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/* Most of the following is blatantly stolen from esound. */
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/* path and name of the default EsounD domain socket */
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#define ESD_UNIX_SOCKET_DIR "/tmp/.esd"
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#define ESD_UNIX_SOCKET_NAME "/tmp/.esd/socket"
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/* length of the audio buffer size */
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#define ESD_BUF_SIZE (4 * 1024)
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/* maximum size we can write(). Otherwise we might overflow */
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#define ESD_MAX_WRITE_SIZE (21 * 4096)
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/* length of the authorization key, octets */
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#define ESD_KEY_LEN (16)
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/* default port for the EsounD server */
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#define ESD_DEFAULT_PORT (16001)
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/* default sample rate for the EsounD server */
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#define ESD_DEFAULT_RATE (44100)
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/* maximum length of a stream/sample name */
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#define ESD_NAME_MAX (128)
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/* a magic number to identify the relative endianness of a client */
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#define ESD_ENDIAN_KEY ((uint32_t) (('E' << 24) + ('N' << 16) + ('D' << 8) + ('N')))
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#define ESD_VOLUME_BASE (256)
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/*************************************/
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/* what can we do to/with the EsounD */
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enum esd_proto {
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ESD_PROTO_CONNECT, /* implied on inital client connection */
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/* pseudo "security" functionality */
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ESD_PROTO_LOCK, /* disable "foreign" client connections */
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ESD_PROTO_UNLOCK, /* enable "foreign" client connections */
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/* stream functionality: play, record, monitor */
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ESD_PROTO_STREAM_PLAY, /* play all following data as a stream */
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ESD_PROTO_STREAM_REC, /* record data from card as a stream */
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ESD_PROTO_STREAM_MON, /* send mixed buffer output as a stream */
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/* sample functionality: cache, free, play, loop, EOL, kill */
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ESD_PROTO_SAMPLE_CACHE, /* cache a sample in the server */
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ESD_PROTO_SAMPLE_FREE, /* release a sample in the server */
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ESD_PROTO_SAMPLE_PLAY, /* play a cached sample */
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ESD_PROTO_SAMPLE_LOOP, /* loop a cached sample, til eoloop */
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ESD_PROTO_SAMPLE_STOP, /* stop a looping sample when done */
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ESD_PROTO_SAMPLE_KILL, /* stop the looping sample immed. */
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/* free and reclaim /dev/dsp functionality */
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ESD_PROTO_STANDBY, /* release /dev/dsp and ignore all data */
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ESD_PROTO_RESUME, /* reclaim /dev/dsp and play sounds again */
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/* TODO: move these to a more logical place. NOTE: will break the protocol */
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ESD_PROTO_SAMPLE_GETID, /* get the ID for an already-cached sample */
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ESD_PROTO_STREAM_FILT, /* filter mixed buffer output as a stream */
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/* esd remote management */
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ESD_PROTO_SERVER_INFO, /* get server info (ver, sample rate, format) */
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ESD_PROTO_ALL_INFO, /* get all info (server info, players, samples) */
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ESD_PROTO_SUBSCRIBE, /* track new and removed players and samples */
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ESD_PROTO_UNSUBSCRIBE, /* stop tracking updates */
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/* esd remote control */
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ESD_PROTO_STREAM_PAN, /* set stream panning */
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ESD_PROTO_SAMPLE_PAN, /* set default sample panning */
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/* esd status */
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ESD_PROTO_STANDBY_MODE, /* see if server is in standby, autostandby, etc */
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/* esd latency */
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ESD_PROTO_LATENCY, /* retrieve latency between write()'s and output */
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ESD_PROTO_MAX /* for bounds checking */
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};
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/******************/
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/* The EsounD api */
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/* the properties of a sound buffer are logically or'd */
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/* bits of stream/sample data */
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#define ESD_MASK_BITS ( 0x000F )
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#define ESD_BITS8 ( 0x0000 )
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#define ESD_BITS16 ( 0x0001 )
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/* how many interleaved channels of data */
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#define ESD_MASK_CHAN ( 0x00F0 )
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#define ESD_MONO ( 0x0010 )
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#define ESD_STEREO ( 0x0020 )
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/* whether it's a stream or a sample */
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#define ESD_MASK_MODE ( 0x0F00 )
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#define ESD_STREAM ( 0x0000 )
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#define ESD_SAMPLE ( 0x0100 )
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#define ESD_ADPCM ( 0x0200 ) /* TODO: anyone up for this? =P */
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/* the function of the stream/sample, and common functions */
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#define ESD_MASK_FUNC ( 0xF000 )
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#define ESD_PLAY ( 0x1000 )
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/* functions for streams only */
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#define ESD_MONITOR ( 0x0000 )
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#define ESD_RECORD ( 0x2000 )
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/* functions for samples only */
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#define ESD_STOP ( 0x0000 )
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#define ESD_LOOP ( 0x2000 )
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typedef int esd_format_t;
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typedef int esd_proto_t;
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/*******************************************************************/
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/* esdmgr.c - functions to implement a "sound manager" for esd */
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/* structures to retrieve information about streams/samples from the server */
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typedef struct esd_server_info {
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int version; /* server version encoded as an int */
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esd_format_t format; /* magic int with the format info */
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int rate; /* sample rate */
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} esd_server_info_t;
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typedef struct esd_player_info {
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struct esd_player_info *next; /* point to next entry in list */
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esd_server_info_t *server; /* the server that contains this stream */
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int source_id; /* either a stream fd or sample id */
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char name[ ESD_NAME_MAX ]; /* name of stream for remote control */
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int rate; /* sample rate */
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int left_vol_scale; /* volume scaling */
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int right_vol_scale;
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esd_format_t format; /* magic int with the format info */
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} esd_player_info_t;
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typedef struct esd_sample_info {
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struct esd_sample_info *next; /* point to next entry in list */
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esd_server_info_t *server; /* the server that contains this sample */
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int sample_id; /* either a stream fd or sample id */
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char name[ ESD_NAME_MAX ]; /* name of stream for remote control */
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int rate; /* sample rate */
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int left_vol_scale; /* volume scaling */
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int right_vol_scale;
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esd_format_t format; /* magic int with the format info */
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int length; /* total buffer length */
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} esd_sample_info_t;
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typedef struct esd_info {
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esd_server_info_t *server;
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esd_player_info_t *player_list;
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esd_sample_info_t *sample_list;
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} esd_info_t;
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enum esd_standby_mode {
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ESM_ERROR, ESM_ON_STANDBY, ESM_ON_AUTOSTANDBY, ESM_RUNNING
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};
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typedef int esd_standby_mode_t;
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enum esd_client_state {
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ESD_STREAMING_DATA, /* data from here on is streamed data */
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ESD_CACHING_SAMPLE, /* midway through caching a sample */
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ESD_NEEDS_REQDATA, /* more data needed to complere request */
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ESD_NEXT_REQUEST, /* proceed to next request */
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ESD_CLIENT_STATE_MAX /* place holder */
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};
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typedef int esd_client_state_t;
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/* switch endian order for cross platform playing */
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#define swap_endian_32(x) ((x >> 24) | ((x >> 8) & 0xFF00) | (((x & 0xFF00) << 8)) | (x << 24))
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#define maybe_swap_endian_32(c,x) ((c) ? swap_endian_32(x) : x)
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/* the endian key is transferred in binary, if it's read into int, */
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/* and matches ESD_ENDIAN_KEY (ENDN), then the endianness of the */
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/* server and the client match; if it's SWAP_ENDIAN_KEY, swap data */
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#define ESD_SWAP_ENDIAN_KEY ((uint32_t) swap_endian_32(ESD_ENDIAN_KEY))
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#endif
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