playsound.c File Reference

#include <string.h>
#include "playsound.h"

Functions
static void	I2S_SendWavData (uint8_t *DataBuffer, uint32_t len)
	Send I2S data. More...
static void	snd_card_config (void)
	Initialize the structure information for sai. More...
void	PLAYSOUND_Init (void)
	Init sound card. More...
int	PLAYSOUND_Play (APP_GET_DATA_FUNC fpAppGetData)
	Use sound card to play audio, need wave file data, only support standard Windows PCM uncompressed file. More...
int	PLAYSOUND_GetWaveFileInfo (uint8_t *pBuffer, wave_file_t *pWave)
	Decode wave file header, only support standard Windows PCM uncompressed file. More...

Variables
sound_card_t	g_card
static sai_data_format_t	format
static sai_user_config_t	tx_config
static sai_handler_t	tx_handler
static sgtl_handler_t	codec_handler

Function Documentation

static void I2S_SendWavData ( uint8_t *  DataBuffer, uint32_t  len  )

static

This function should call PD layer funcion snd_trigger_tx.

Parameters

DataBuffer	pointer for data buffer
len	number of bytes to write
pformat	pointer to a wave data format struct

int PLAYSOUND_GetWaveFileInfo	(	uint8_t *	pBuffer,
		wave_file_t *	pWave
	)

This function decode Windows PCM wave file data and, if success, loaded file header information into struct instance.

Parameters

[in]	pBuffer	Pointer to a wave file start address.
[in]	pWave	Pointer to a wave_file struct.

Returns

0:succ 1:fail

void PLAYSOUND_Init

(

void

)

This function will initialize controller(K70's sai moudle) and decoder(SGTL5000) and config them with default values for play audio.

Note

8 bit is not supported in SGTL5000

int PLAYSOUND_Play

(

APP_GET_DATA_FUNC

fpAppGetData

)

Before calling this function, we must make sure PLAYSOUND_Init has alrady called. This function will play audio according to wave file data which acquired by a user callback function. Prototyoe of "GetData" function: uint32_t APP_GetData(uint32_t NumBtytesReq, uint8_t **ppData, uint32_t offset)

Parameters

[in]

fpAppGetData

Pointer to a function which is called by PLAYSOUND_Play routine for getting data.

Returns

0:succ 1:fail

static void snd_card_config ( void  )

static

Variable Documentation

sgtl_handler_t codec_handler

static

sai_data_format_t format

static

sound_card_t g_card

sai_user_config_t tx_config

static

sai_handler_t tx_handler

static