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212 lines
9 KiB
C
212 lines
9 KiB
C
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/*
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*
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* ao_private.c
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*
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* Copyright (C) Stan Seibert - July 2001
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*
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* This file is part of libao, a cross-platform audio output library. 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_PRIVATE_H__
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#define __AO_PRIVATE_H__
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/* --- Operating System Compatibility --- */
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/*
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OpenBSD systems with a.out binaries require dlsym()ed symbols to be
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prepended with an underscore, so we need the following nasty #ifdef
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hack.
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*/
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#if defined(__OpenBSD__) && !defined(__ELF__)
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#define dlsym(h,s) dlsym(h, "_" s)
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#endif
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/* RTLD_NOW is the preferred symbol resolution behavior, but
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* some platforms do not support it. The autoconf script will have
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* already defined DLOPEN_FLAG if the default is unacceptable on the
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* current platform.
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*
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* ALSA requires RTLD_GLOBAL.
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*/
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#if !defined(DLOPEN_FLAG)
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#define DLOPEN_FLAG (RTLD_NOW | RTLD_GLOBAL)
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#endif
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/* --- Constants --- */
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#ifndef AO_SYSTEM_CONFIG
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#define AO_SYSTEM_CONFIG "/etc/libao.conf"
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#endif
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#ifndef AO_USER_CONFIG
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#define AO_USER_CONFIG "/.libao"
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#endif
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/* --- Structures --- */
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typedef struct ao_config {
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char *default_driver;
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} ao_config;
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typedef enum {
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AO_OUTPUT_MATRIX_UNDEFINED=0, /* matrix unset */
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AO_OUTPUT_MATRIX_FIXED=1, /* fixed, immutable channel order, eg, ALSA */
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AO_OUTPUT_MATRIX_COLLAPSIBLE=2, /* fixed order but only used channels sent, eg MACOS */
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AO_OUTPUT_MATRIX_PERMUTABLE=3, /* channel map is fully permutable. eg Pulse */
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} ao_outorder;
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struct ao_device {
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int type; /* live output or file output? */
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int driver_id;
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ao_functions *funcs;
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FILE *file; /* File for output if this is a file driver */
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/* input not necessarily == output. Right now, byte order, channel
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count, and channel mappings may be altered. */
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int client_byte_format;
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int machine_byte_format;
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int driver_byte_format;
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char *swap_buffer;
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int swap_buffer_size; /* Bytes allocated to swap_buffer */
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int input_channels;
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int output_channels;
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int bytewidth;
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int rate;
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ao_outorder output_matrix_order;
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char *output_matrix; /* physical output channel
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ordering/numbering matrix set by
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driver if there's a channel
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name->number mapping useful to the
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backend driver in some way. Eg,
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Pulse has fully permutable input
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channel masks, but specific channels
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locations (eg, 'Center') still have
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assigned numbers even if not a
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specific slot int he input
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interleave. */
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int output_mask;
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int *input_map; /* input permutation mapping from each
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input channel to a location in the
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output_matrix. Made by ao_open,
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intended for convenience use by
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driver in device open. */
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char *inter_matrix; /* channel matrix as presented to the
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backend API */
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int *inter_permute; /* maps from each channel in the
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inter_matrix back to an input channel
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(if any) */
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void *internal; /* Pointer to driver-specific data */
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int verbose;
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};
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struct ao_functions {
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int (*test)(void);
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ao_info* (*driver_info)(void);
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int (*device_init)(ao_device *device);
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int (*set_option)(ao_device *device, const char *key,
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const char *value);
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int (*open)(ao_device *device, ao_sample_format *format);
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int (*play)(ao_device *device, const char *output_samples,
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uint_32 num_bytes);
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int (*close)(ao_device *device);
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void (*device_clear)(ao_device *device);
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const char* (*file_extension)(void);
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};
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/* --- Functions --- */
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void ao_read_config_files (ao_config *config);
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#define adebug(format, args...) {\
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if(!device || device->verbose==2){ \
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if(strcmp(format,"\n")){ \
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if(device && device->funcs->driver_info()->short_name){ \
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fprintf(stderr,"ao_%s debug: " format,device->funcs->driver_info()->short_name,## args); \
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}else{ \
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fprintf(stderr,"debug: " format,## args); \
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} \
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}else{ \
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fprintf(stderr,"\n"); \
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} \
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} \
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}
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#define averbose(format, args...) {\
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if(!device || device->verbose>0){ \
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if(strcmp(format,"\n")){ \
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if(device && device->funcs->driver_info()->short_name){ \
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fprintf(stderr,"ao_%s info: " format,device->funcs->driver_info()->short_name,## args); \
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}else{ \
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fprintf(stderr,"info: " format,## args); \
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} \
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}else{ \
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fprintf(stderr,"\n"); \
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} \
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} \
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}
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#define ainfo(format, args...) {\
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if(!device || device->verbose>=0){ \
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if(strcmp(format,"\n")){ \
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if(device && device->funcs->driver_info()->short_name){ \
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fprintf(stderr,"ao_%s info: " format,device->funcs->driver_info()->short_name,## args); \
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}else{ \
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fprintf(stderr,"info: " format,## args); \
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} \
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}else{ \
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fprintf(stderr,"\n"); \
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} \
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} \
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}
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#define awarn(format, args...) {\
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if(!device || device->verbose>=0){ \
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if(strcmp(format,"\n")){ \
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if(device && device->funcs->driver_info()->short_name){ \
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fprintf(stderr,"ao_%s WARNING: " format,device->funcs->driver_info()->short_name,## args); \
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}else{ \
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fprintf(stderr,"WARNING: " format,## args); \
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} \
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}else{ \
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fprintf(stderr,"\n"); \
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} \
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} \
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}
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#define aerror(format, args...) { \
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if(!device || device->verbose>=0){ \
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if(strcmp(format,"\n")){ \
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if(device && device->funcs->driver_info()->short_name){ \
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fprintf(stderr,"ao_%s ERROR: " format,device->funcs->driver_info()->short_name,## args); \
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}else{ \
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fprintf(stderr,"ERROR: " format,## args); \
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} \
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}else{ \
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fprintf(stderr,"\n"); \
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} \
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} \
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}
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#endif /* __AO_PRIVATE_H__ */
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