test2.h

这是一个自己开发的键盘驱动代码

#ifndef TEST2_H
#define TEST2_H

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/file.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <getopt.h>
#include <signal.h>
#include <endian.h>
#include <linux/soundcard.h>
#include <sys/resource.h>
#include <linux/config.h>

#ifdef CONFIG_KEY
#include <linux/key.h>
#endif

//#include "defs.h"
#include "mpegdec.h"
#include "fastmem.h"

int	prebuflimit;

static unsigned char ready = 0;

/*
 *	Global settings per decode stream. Used to control the final
 *	PCM to raw driver data conversion.
 */
static int	stereo;
static int	bits;
static int	quality;

/****************************************************************************/

/*
 *	Master MP3 decoder settings.
 */
static MPEGDEC_STREAM	*mps = NULL;

static MPEGDEC_CTRL	mpa_ctrl;
static MPEGDEC_CTRL	mpa_defctrl = {
	NULL,    // Bitstream access is default file I/O
	// Layers I & II settings (#3)
	{ FALSE, { 1, 2, 48000 }, { 1, 2, 48000 } },
	// Layer III settings (#3)
	{ FALSE, { 1, 2, 48000 }, { 1, 2, 48000 } },
	0,		// #2: Don't check mpeg validity at start
	// (needed for mux stream)
	2048		// #2: Stream Buffer size
};

static char *modes[] = { "stereo", "j-stereo", "dual", "mono" };

/****************************************************************************/

/*
 *	MP3 data stream support (could be file or http stream).
 */
#define MP3_BUF_SIZE	(1024)

static char	*mp3_filename;
static int	mp3_fd;
static INT8	*mp3_buffer;
static UINT32	mp3_buffer_size;
static UINT32	mp3_buffer_offset;
static UINT32	mp3_buffer_next_block;
static UINT32	mp3_stream_size;

static char	*rawbuf;
static char	*prebuffer;

int		prebufsize;
int		prebufcnt;
int		prebufnow;

INT16	*pcm[MPEGDEC_MAX_CHANNELS];
int dspfd;
int	pcmcount, rawcount;

static int getstreamsize(void);
static UINT32 getnextbuffer();
INT32 bs_open(char *stream_name, INT32 buffer_size, INT32 *stream_size);
void bs_close(INT32 handle);
INT32 bs_read(INT32 handle, void *buffer, INT32 num_bytes);
int bs_seek(INT32 handle, INT32 abs_byte_seek_pos);
void setdsp(int fd, int playstereo, int playbits);
int writepcm(int fd, INT16 *pcm[2], int count);
void flushpcm(int fd);
void close_all();
int ready_play( const char *fn );
void play_frame( unsigned char *ply );
void play_forward( int f );
void play_backward( int b );

#endif