hw/lm4549.h

   1 /*
   2  * LM4549 Audio Codec Interface
   3  *
   4  * Copyright (c) 2011
   5  * Written by Mathieu Sonet - www.elasticsheep.com
   6  *
   7  * This code is licensed under the GPL.
   8  *
   9  * *****************************************************************
  10  */
  11
  12 #ifndef HW_LM4549_H
  13 #define HW_LM4549_H
  14
  15 #include "audio/audio.h"
  16
  17 typedef void (*lm4549_callback)(void *opaque);
  18
  19 #define LM4549_BUFFER_SIZE (512 * 2) /* 512 16-bit stereo samples */
  20
  21
  22 typedef struct {
  23     QEMUSoundCard card;
  24     SWVoiceOut *voice;
  25     uint32_t voice_is_active;
  26
  27     uint16_t regfile[128];
  28     lm4549_callback data_req_cb;
  29     void *opaque;
  30
  31     uint16_t buffer[LM4549_BUFFER_SIZE];
  32     uint32_t buffer_level;
  33 } lm4549_state;
  34
  35 extern const VMStateDescription vmstate_lm4549_state;
  36
  37
  38 void lm4549_init(lm4549_state *s, lm4549_callback data_req, void *opaque);
  39 uint32_t lm4549_read(lm4549_state *s, hwaddr offset);
  40 void lm4549_write(lm4549_state *s, hwaddr offset, uint32_t value);
  41 uint32_t lm4549_write_samples(lm4549_state *s, uint32_t left, uint32_t right);
  42
  43 #endif /* #ifndef HW_LM4549_H */