107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
|
/*
|
||
|
|
audio: audio output interface
|
||
|
|
|
||
|
|
copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
|
||
|
|
see COPYING and AUTHORS files in distribution or http://mpg123.org
|
||
|
|
initially written by Michael Hipp
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Audio 'LIB' defines
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef _MPG123_AUDIO_H_
|
||
|
|
#define _MPG123_AUDIO_H_
|
||
|
|
|
||
|
|
#include "compat.h"
|
||
|
|
#include "mpg123.h"
|
||
|
|
#include "module.h"
|
||
|
|
|
||
|
|
#define AUDIO_OUT_HEADPHONES 0x01
|
||
|
|
#define AUDIO_OUT_INTERNAL_SPEAKER 0x02
|
||
|
|
#define AUDIO_OUT_LINE_OUT 0x04
|
||
|
|
|
||
|
|
enum {
|
||
|
|
DECODE_TEST,
|
||
|
|
DECODE_AUDIO,
|
||
|
|
DECODE_FILE,
|
||
|
|
DECODE_BUFFER,
|
||
|
|
DECODE_WAV,
|
||
|
|
DECODE_AU,
|
||
|
|
DECODE_CDR,
|
||
|
|
DECODE_AUDIOFILE
|
||
|
|
};
|
||
|
|
|
||
|
|
/* 3% rate tolerance */
|
||
|
|
#define AUDIO_RATE_TOLERANCE 3
|
||
|
|
|
||
|
|
typedef struct audio_output_struct
|
||
|
|
{
|
||
|
|
int fn; /* filenumber */
|
||
|
|
void *userptr; /* driver specific pointer */
|
||
|
|
|
||
|
|
/* Callbacks */
|
||
|
|
int (*open)(struct audio_output_struct *);
|
||
|
|
int (*get_formats)(struct audio_output_struct *);
|
||
|
|
int (*write)(struct audio_output_struct *, unsigned char *,int);
|
||
|
|
void (*flush)(struct audio_output_struct *);
|
||
|
|
int (*close)(struct audio_output_struct *);
|
||
|
|
int (*deinit)(struct audio_output_struct *);
|
||
|
|
|
||
|
|
/* the module this belongs to */
|
||
|
|
mpg123_module_t *module;
|
||
|
|
|
||
|
|
char *device; /* device name */
|
||
|
|
int flags; /* some bits; namely headphone/speaker/line */
|
||
|
|
long rate; /* sample rate */
|
||
|
|
long gain; /* output gain */
|
||
|
|
int channels; /* number of channels */
|
||
|
|
int format; /* format flags */
|
||
|
|
int is_open; /* something opened? */
|
||
|
|
#define MPG123_OUT_QUIET 1
|
||
|
|
int auxflags; /* For now just one: quiet mode (for probing). */
|
||
|
|
} audio_output_t;
|
||
|
|
|
||
|
|
/* Lazy. */
|
||
|
|
#define AOQUIET (ao->auxflags & MPG123_OUT_QUIET)
|
||
|
|
|
||
|
|
struct audio_format_name {
|
||
|
|
int val;
|
||
|
|
char *name;
|
||
|
|
char *sname;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define pitch_rate(rate) (param.pitch == 0 ? (rate) : (long) ((param.pitch+1.0)*(rate)))
|
||
|
|
|
||
|
|
/* ------ Declarations from "audio.c" ------ */
|
||
|
|
|
||
|
|
audio_output_t* open_output_module( const char* name );
|
||
|
|
void close_output_module( audio_output_t* ao );
|
||
|
|
audio_output_t* alloc_audio_output();
|
||
|
|
void audio_capabilities(audio_output_t *ao, mpg123_handle *mh);
|
||
|
|
int audio_fit_capabilities(audio_output_t *ao,int c,int r);
|
||
|
|
const char* audio_encoding_name(const int encoding, const int longer);
|
||
|
|
void print_capabilities(audio_output_t *ao, mpg123_handle *mh);
|
||
|
|
|
||
|
|
int init_output(audio_output_t **ao);
|
||
|
|
void exit_output(audio_output_t *ao, int rude);
|
||
|
|
int flush_output(audio_output_t *ao, unsigned char *bytes, size_t count);
|
||
|
|
int open_output(audio_output_t *ao);
|
||
|
|
void close_output(audio_output_t *ao );
|
||
|
|
int reset_output(audio_output_t *ao);
|
||
|
|
void output_pause(audio_output_t *ao); /* Prepare output for inactivity. */
|
||
|
|
void output_unpause(audio_output_t *ao); /* Reactivate output (buffer process). */
|
||
|
|
|
||
|
|
void audio_enclist(char** list); /* Make a string of encoding names. */
|
||
|
|
|
||
|
|
/*
|
||
|
|
Twiddle audio output rate to yield speedup/down (pitch) effect.
|
||
|
|
The actually achieved pitch value is stored in param.pitch.
|
||
|
|
Returns 1 if pitch setting succeeded, 0 otherwise.
|
||
|
|
*/
|
||
|
|
int set_pitch(mpg123_handle *fr, audio_output_t *ao, double new_pitch);
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|