audio_codec_alac.h

来自「AMLOGIC DPF source code」· C头文件 代码 · 共 78 行

#ifndef _AUDIO_CODEC_ALAC_H
#define _AUDIO_CODEC_ALAC_H

#include "ioapi.h"

#define DECLARE_DEVICE_DRIVER_INIT(name) \
avfs_device_driver audio_device_##name##_init(avfs_device_major_number major, avfs_device_minor_number minor, void *arg)
#define DECLARE_DEVICE_DRIVER_OPEN(name) \
avfs_device_driver audio_device_##name##_open(avfs_device_major_number major, avfs_device_minor_number minor, void *arg)
#define DECLARE_DEVICE_DRIVER_CLOSE(name) \
avfs_device_driver audio_device_##name##_close(avfs_device_major_number major, avfs_device_minor_number minor, void *arg)
#define DECLARE_DEVICE_DRIVER_IOCTL(name) \
avfs_device_driver audio_device_##name##_ioctl(avfs_device_major_number major, avfs_device_minor_number minor, void *arg)
#define DECLARE_DEVICE_DRIVER_READ(name) \
avfs_device_driver audio_device_##name##_read(avfs_device_major_number major, avfs_device_minor_number minor, void *arg)
#define DECLARE_DEVICE_DRIVER_WRITE(name) \
avfs_device_driver audio_device_##name##_write(avfs_device_major_number major, avfs_device_minor_number minor, void *arg)

DECLARE_DEVICE_DRIVER_INIT(alacdec);
DECLARE_DEVICE_DRIVER_OPEN(alacdec);
DECLARE_DEVICE_DRIVER_CLOSE(alacdec);
DECLARE_DEVICE_DRIVER_READ(alacdec);
DECLARE_DEVICE_DRIVER_WRITE(alacdec);
DECLARE_DEVICE_DRIVER_IOCTL(alacdec);

#define DEVICE_TABLE_AUDIO_ALACDEC \
    {                               \
        audio_device_alacdec_init,   \
        audio_device_alacdec_open,   \
        audio_device_alacdec_close,  \
        audio_device_alacdec_read,   \
        audio_device_alacdec_write,  \
        audio_device_alacdec_ioctl,  \
    }

typedef struct {
  int32_t samplesize;
  int32_t numchannels;
  int32_t bytespersample;

  /* buffers */
  int32_t *predicterror_buffer_a;
  int32_t *predicterror_buffer_b;

  int32_t *outputsamples_buffer_a;
  int32_t *outputsamples_buffer_b;
  
  void *output_pcm_buffer;

  /* stuff from setinfo */
  uint32_t setinfo_max_samples_per_frame; /* 0x1000 = 4096 */    /* max samples per frame? */
  uint8_t setinfo_7a; /* 0x00 */
  uint8_t setinfo_sample_size; /* 0x10 */
  uint8_t setinfo_rice_historymult; /* 0x28 */
  uint8_t setinfo_rice_initialhistory; /* 0x0a */
  uint8_t setinfo_rice_kmodifier; /* 0x0e */
  uint8_t setinfo_7f; /* 0x02 */
  uint16_t setinfo_80; /* 0x00ff */
  uint32_t setinfo_82; /* 0x000020e7 */
  uint32_t setinfo_86; /* 0x00069fe4 */
  uint32_t setinfo_8a_rate; /* 0x0000ac44 */
  /* end setinfo stuff */

  uint8_t host_bigendian;
  
} _audio_codec_config_alacdec_t;

#define MAX_PCM_SAMPLE_PER_FRAME	0x1000
#if defined(AML_ATHENA)
#define MPEG_DOMAIN_BASE 0x1c00000
#else
#define MPEG_DOMAIN_BASE 0x3c00000
#endif
void decode_alac_frame(_audio_codec_config_alacdec_t *alac, int *outputsize);
void reset_alac_framesize(void);

#endif