usbd_audio_if.c

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/* Includes ------------------------------------------------------------------*/
#include "usbd_audio_if.h"
#include "stm32f769i_discovery_audio.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static int8_t Audio_Init(uint32_t AudioFreq, uint32_t Volume, uint32_t options);
static int8_t Audio_DeInit(uint32_t options);
static int8_t Audio_PlaybackCmd(uint8_t* pbuf, uint32_t size, uint8_t cmd);
static int8_t Audio_VolumeCtl(uint8_t vol);
static int8_t Audio_MuteCtl(uint8_t cmd);
static int8_t Audio_PeriodicTC(uint8_t cmd);
static int8_t Audio_GetState(void);

/* Private variables ---------------------------------------------------------*/

USBD_AUDIO_ItfTypeDef USBD_AUDIO_fops = {
  Audio_Init,
  Audio_DeInit,
  Audio_PlaybackCmd,
  Audio_VolumeCtl,
  Audio_MuteCtl,
  Audio_PeriodicTC,
  Audio_GetState,
};

/* Private functions ---------------------------------------------------------*/

static int8_t Audio_Init(uint32_t  AudioFreq, uint32_t Volume, uint32_t options)
{
#if 0
  BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_AUTO, Volume, AudioFreq);
  
  /* Update the Audio frame slot configuration to match the PCM standard instead of TDM */
  BSP_AUDIO_OUT_SetAudioFrameSlot(CODEC_AUDIOFRAME_SLOT_02);
#endif
  
  return 0;
}

static int8_t Audio_DeInit(uint32_t options)
{
#if 0
  BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
#endif
  return 0;
}

static int8_t Audio_PlaybackCmd(uint8_t *pbuf, uint32_t size, uint8_t cmd)
{
  switch(cmd)
  {
  case AUDIO_CMD_START:
#if 0
    BSP_AUDIO_OUT_Play((uint16_t *)pbuf, 2*size);
#endif
    break;
  
  case AUDIO_CMD_PLAY:
#if 0
    BSP_AUDIO_OUT_ChangeBuffer((uint16_t *)pbuf, 2*size);
#endif
    break;
  }
  return 0;
}

static int8_t Audio_VolumeCtl(uint8_t vol)
{
  BSP_AUDIO_OUT_SetVolume(vol);
  return 0;
}

static int8_t Audio_MuteCtl(uint8_t cmd)
{
  BSP_AUDIO_OUT_SetMute(cmd);
  return 0;
}

static int8_t Audio_PeriodicTC(uint8_t cmd)
{
  return 0;
}

static int8_t Audio_GetState(void)
{
  return 0;
}

#if 0

void BSP_AUDIO_OUT_TransferComplete_CallBack(void)
{
  USBD_AUDIO_Sync(&USBD_Device, AUDIO_OFFSET_FULL);
}

void BSP_AUDIO_OUT_HalfTransfer_CallBack(void)
{ 
  //no need to call
  //USBD_AUDIO_Sync(&USBD_Device, AUDIO_OFFSET_HALF);
}
#endif

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/