sound/oss/vidc.h

   1 /*
   2  *  linux/drivers/sound/vidc.h
   3  *
   4  *  Copyright (C) 1997 Russell King <rmk@arm.linux.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  *  VIDC sound function prototypes
  11  */
  12
  13 /* vidc.c */
  14
  15 extern int vidc_busy;
  16
  17 /* vidc_fill.S */
  18
  19 /*
  20  * Filler routines for different channels and sample sizes
  21  */
  22
  23 extern unsigned long vidc_fill_1x8_u(unsigned long ibuf, unsigned long iend,
  24                                      unsigned long obuf, int mask);
  25 extern unsigned long vidc_fill_2x8_u(unsigned long ibuf, unsigned long iend,
  26                                      unsigned long obuf, int mask);
  27 extern unsigned long vidc_fill_1x8_s(unsigned long ibuf, unsigned long iend,
  28                                      unsigned long obuf, int mask);
  29 extern unsigned long vidc_fill_2x8_s(unsigned long ibuf, unsigned long iend,
  30                                      unsigned long obuf, int mask);
  31 extern unsigned long vidc_fill_1x16_s(unsigned long ibuf, unsigned long iend,
  32                                       unsigned long obuf, int mask);
  33 extern unsigned long vidc_fill_2x16_s(unsigned long ibuf, unsigned long iend,
  34                                       unsigned long obuf, int mask);
  35
  36 /*
  37  * DMA Interrupt handler
  38  */
  39
  40 extern irqreturn_t vidc_sound_dma_irq(int irqnr, void *ref, struct pt_regs *regs);
  41
  42 /*
  43  * Filler routine pointer
  44  */
  45
  46 extern unsigned long (*vidc_filler) (unsigned long ibuf, unsigned long iend,
  47                                      unsigned long obuf, int mask);
  48
  49 /*
  50  * Virtual DMA buffer exhausted
  51  */
  52
  53 extern irqreturn_t (*dma_interrupt) (void);
  54
  55 /*
  56  * Virtual DMA buffer addresses
  57  */
  58
  59 extern unsigned long dma_start, dma_count, dma_bufsize;
  60 extern unsigned long dma_buf[2], dma_pbuf[2];
  61
  62 /* vidc_synth.c */
  63
  64 extern void     vidc_synth_init(struct address_info *hw_config);
  65 extern void     vidc_synth_exit(struct address_info *hw_config);
  66 extern int      vidc_synth_get_volume(void);
  67 extern int      vidc_synth_set_volume(int vol);