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140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/*
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*
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* ao.h
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*
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* Original Copyright (C) Aaron Holtzman - May 1999
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* Modifications Copyright (C) Stan Seibert - July 2000, July 2001
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* More Modifications Copyright (C) Jack Moffitt - October 2000
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*
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* This file is part of libao, a cross-platform audio outputlibrary. See
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* README for a history of this source code.
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*
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* libao 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 by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* libao is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Make; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef __AO_H__
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#define __AO_H__
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "os_types.h"
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/* --- Constants ---*/
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#define AO_TYPE_LIVE 1
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#define AO_TYPE_FILE 2
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#define AO_ENODRIVER 1
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#define AO_ENOTFILE 2
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#define AO_ENOTLIVE 3
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#define AO_EBADOPTION 4
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#define AO_EOPENDEVICE 5
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#define AO_EOPENFILE 6
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#define AO_EFILEEXISTS 7
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#define AO_EBADFORMAT 8
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#define AO_EFAIL 100
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#define AO_FMT_LITTLE 1
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#define AO_FMT_BIG 2
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#define AO_FMT_NATIVE 4
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/* --- Structures --- */
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typedef struct ao_info {
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int type; /* live output or file output? */
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char *name; /* full name of driver */
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char *short_name; /* short name of driver */
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char *author; /* driver author */
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char *comment; /* driver comment */
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int preferred_byte_format;
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int priority;
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char **options;
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int option_count;
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} ao_info;
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typedef struct ao_functions ao_functions;
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typedef struct ao_device ao_device;
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typedef struct ao_sample_format {
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int bits; /* bits per sample */
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int rate; /* samples per second (in a single channel) */
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int channels; /* number of audio channels */
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int byte_format; /* Byte ordering in sample, see constants below */
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char *matrix; /* input channel location/ordering */
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} ao_sample_format;
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typedef struct ao_option {
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char *key;
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char *value;
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struct ao_option *next;
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} ao_option;
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#if defined(AO_BUILDING_LIBAO)
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#include "ao_private.h"
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#endif
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/* --- Functions --- */
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/* library setup/teardown */
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void ao_initialize(void);
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void ao_shutdown(void);
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/* device setup/playback/teardown */
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int ao_append_global_option(const char *key,
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const char *value);
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int ao_append_option(ao_option **options,
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const char *key,
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const char *value);
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void ao_free_options(ao_option *options);
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ao_device* ao_open_live(int driver_id,
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ao_sample_format *format,
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ao_option *option);
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ao_device* ao_open_file(int driver_id,
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const char *filename,
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int overwrite,
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ao_sample_format *format,
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ao_option *option);
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int ao_play(ao_device *device,
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char *output_samples,
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uint_32 num_bytes);
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int ao_close(ao_device *device);
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/* driver information */
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int ao_driver_id(const char *short_name);
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int ao_default_driver_id(void);
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ao_info *ao_driver_info(int driver_id);
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ao_info **ao_driver_info_list(int *driver_count);
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const char *ao_file_extension(int driver_id);
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/* miscellaneous */
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int ao_is_big_endian(void);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __AO_H__ */
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