hw/audio/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 #include "exec/hwaddr.h"
  17
  18 typedef void (*lm4549_callback)(void *opaque);
  19
  20 #define LM4549_BUFFER_SIZE (512 * 2) /* 512 16-bit stereo samples */
  21
  22
  23 typedef struct {
  24     QEMUSoundCard card;
  25     SWVoiceOut *voice;
  26     uint32_t voice_is_active;
  27
  28     uint16_t regfile[128];
  29     lm4549_callback data_req_cb;
  30     void *opaque;
  31
  32     uint16_t buffer[LM4549_BUFFER_SIZE];
  33     uint32_t buffer_level;
  34 } lm4549_state;
  35
  36 extern const VMStateDescription vmstate_lm4549_state;
  37
  38
  39 void lm4549_init(lm4549_state *s, lm4549_callback data_req, void *opaque,
  40                  Error **errp);
  41 uint32_t lm4549_read(lm4549_state *s, hwaddr offset);
  42 void lm4549_write(lm4549_state *s, hwaddr offset, uint32_t value);
  43 uint32_t lm4549_write_samples(lm4549_state *s, uint32_t left, uint32_t right);
  44
  45 #endif /* HW_LM4549_H */