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_fill.S */
  14
  15 /*
  16  * Filler routines for different channels and sample sizes
  17  */
  18
  19 extern unsigned long vidc_fill_1x8_u(unsigned long ibuf, unsigned long iend,
  20                                      unsigned long obuf, int mask);
  21 extern unsigned long vidc_fill_2x8_u(unsigned long ibuf, unsigned long iend,
  22                                      unsigned long obuf, int mask);
  23 extern unsigned long vidc_fill_1x8_s(unsigned long ibuf, unsigned long iend,
  24                                      unsigned long obuf, int mask);
  25 extern unsigned long vidc_fill_2x8_s(unsigned long ibuf, unsigned long iend,
  26                                      unsigned long obuf, int mask);
  27 extern unsigned long vidc_fill_1x16_s(unsigned long ibuf, unsigned long iend,
  28                                       unsigned long obuf, int mask);
  29 extern unsigned long vidc_fill_2x16_s(unsigned long ibuf, unsigned long iend,
  30                                       unsigned long obuf, int mask);
  31
  32 /*
  33  * DMA Interrupt handler
  34  */
  35
  36 extern irqreturn_t vidc_sound_dma_irq(int irqnr, void *ref, struct pt_regs *regs);
  37
  38 /*
  39  * Filler routine pointer
  40  */
  41
  42 extern unsigned long (*vidc_filler) (unsigned long ibuf, unsigned long iend,
  43                                      unsigned long obuf, int mask);
  44
  45 /*
  46  * Virtual DMA buffer exhausted
  47  */
  48
  49 extern irqreturn_t (*dma_interrupt) (void);
  50
  51 /*
  52  * Virtual DMA buffer addresses
  53  */
  54
  55 extern unsigned long dma_start, dma_count, dma_bufsize;
  56 extern unsigned long dma_buf[2], dma_pbuf[2];
  57
  58 /* vidc_synth.c */
  59
  60 extern void     vidc_synth_init(struct address_info *hw_config);
  61 extern void     vidc_synth_exit(struct address_info *hw_config);
  62 extern int      vidc_synth_get_volume(void);
  63 extern int      vidc_synth_set_volume(int vol);