vidc.h

arm平台上的uclinux系统全部源代码

/*
 * sound/vidc.h
 *
 * VIDC sound function prototypes
 *
 * Copyright (C) 1997 Russell King
 */

/* vidc.c */
extern int vidc_busy;

/* vidc_fill.S */
/*
 * Filler routines for different channels and sample sizes
 */
extern unsigned long vidc_fill_1x8_u(unsigned long ibuf, unsigned long iend,
				     unsigned long obuf, int mask);
extern unsigned long vidc_fill_2x8_u(unsigned long ibuf, unsigned long iend,
				     unsigned long obuf, int mask);
extern unsigned long vidc_fill_1x8_s(unsigned long ibuf, unsigned long iend,
				     unsigned long obuf, int mask);
extern unsigned long vidc_fill_2x8_s(unsigned long ibuf, unsigned long iend,
				     unsigned long obuf, int mask);
extern unsigned long vidc_fill_1x16_s(unsigned long ibuf, unsigned long iend,
				      unsigned long obuf, int mask);
extern unsigned long vidc_fill_2x16_s(unsigned long ibuf, unsigned long iend,
				      unsigned long obuf, int mask);

/*
 * DMA Interrupt handler
 */
extern void vidc_sound_dma_irq (int irqnr, void *ref, struct pt_regs *regs);

/*
 * Filler routine pointer
 */
extern unsigned long (*vidc_filler) (unsigned long ibuf, unsigned long iend,
				     unsigned long obuf, int mask);

/*
 * Virtual DMA buffer exhausted
 */
extern void (*dma_interrupt)(void);

/*
 * Virtual DMA buffer addresses
 */
extern unsigned long dma_start, dma_count, dma_bufsize;
extern unsigned long dma_buf[2], dma_pbuf[2];

/* vidc_audio.c */
extern void vidc_audio_init (struct address_info *hw_config);
extern int  vidc_audio_get_volume (void);
extern int  vidc_audio_set_volume (int vol);

/* vidc_mixer.c */
extern void vidc_mixer_init (struct address_info *hw_config);

/* vidc_synth.c */
extern void vidc_synth_init (struct address_info *hw_config);
extern int  vidc_synth_get_volume (void);
extern int  vidc_synth_set_volume (int vol);