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/**
******************************************************************************
* @file Audio/Audio_playback_and_record/Src/waveplayer.c
* @author MCD Application Team
* @brief This file provides the Audio Out (playback) interface API
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "waveplayer.h"
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private typedef -----------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static AUDIO_OUT_BufferTypeDef BufferCtl;
static int16_t FilePos = 0;
static __IO uint32_t uwVolume = 70;
WAVE_FormatTypeDef WaveFormat;
FIL WavFile;
extern FILELIST_FileTypeDef FileList;
/* Private function prototypes -----------------------------------------------*/
static AUDIO_ErrorTypeDef GetFileInfo(uint16_t file_idx, WAVE_FormatTypeDef *info);
static uint8_t PlayerInit(uint32_t AudioFreq);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Initializes Audio Interface.
* @param None
* @retval Audio error
*/
AUDIO_ErrorTypeDef AUDIO_PLAYER_Init(void)
{
if(BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_AUTO, uwVolume, I2S_AUDIOFREQ_48K) == 0)
{
return AUDIO_ERROR_NONE;
}
else
{
return AUDIO_ERROR_IO;
}
}
/**
* @brief Starts Audio streaming.
* @param idx: File index
* @retval Audio error
*/
AUDIO_ErrorTypeDef AUDIO_PLAYER_Start(uint8_t idx)
{
uint32_t bytesread;
f_close(&WavFile);
if(AUDIO_GetWavObjectNumber() > idx)
{
GetFileInfo(idx, &WaveFormat);
/*Adjust the Audio frequency */
PlayerInit(WaveFormat.SampleRate);
BufferCtl.state = BUFFER_OFFSET_NONE;
/* Get Data from USB Flash Disk */
f_lseek(&WavFile, 0);
/* Fill whole buffer at first time */
if(f_read(&WavFile,
&BufferCtl.buff[0],
AUDIO_OUT_BUFFER_SIZE,
(void *)&bytesread) == FR_OK)
{
AudioState = AUDIO_STATE_PLAY;
BSP_LCD_DisplayStringAt(250, LINE(14), (uint8_t *)" [PLAY ]", LEFT_MODE);
{
if(bytesread != 0)
{
BSP_AUDIO_OUT_Play((uint16_t*)&BufferCtl.buff[0], AUDIO_OUT_BUFFER_SIZE);
BufferCtl.fptr = bytesread;
return AUDIO_ERROR_NONE;
}
}
}
}
return AUDIO_ERROR_IO;
}
/**
* @brief Manages Audio process.
* @param None
* @retval Audio error
*/
AUDIO_ErrorTypeDef AUDIO_PLAYER_Process(void)
{
uint32_t bytesread, elapsed_time;
AUDIO_ErrorTypeDef audio_error = AUDIO_ERROR_NONE;
static uint32_t prev_elapsed_time = 0xFFFFFFFF;
uint8_t str[32];
switch(AudioState)
{
case AUDIO_STATE_PLAY:
if(BufferCtl.fptr >= WaveFormat.FileSize)
{
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
AudioState = AUDIO_STATE_NEXT;
}
if(BufferCtl.state == BUFFER_OFFSET_HALF)
{
if(f_read(&WavFile,
&BufferCtl.buff[0],
AUDIO_OUT_BUFFER_SIZE/2,
(void *)&bytesread) != FR_OK)
{
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
return AUDIO_ERROR_IO;
}
BufferCtl.state = BUFFER_OFFSET_NONE;
BufferCtl.fptr += bytesread;
}
if(BufferCtl.state == BUFFER_OFFSET_FULL)
{
if(f_read(&WavFile,
&BufferCtl.buff[AUDIO_OUT_BUFFER_SIZE /2],
AUDIO_OUT_BUFFER_SIZE/2,
(void *)&bytesread) != FR_OK)
{
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
return AUDIO_ERROR_IO;
}
BufferCtl.state = BUFFER_OFFSET_NONE;
BufferCtl.fptr += bytesread;
}
/* Display elapsed time */
elapsed_time = BufferCtl.fptr / WaveFormat.ByteRate;
if(prev_elapsed_time != elapsed_time)
{
prev_elapsed_time = elapsed_time;
sprintf((char *)str, "[%02d:%02d]", (int)(elapsed_time /60), (int)(elapsed_time%60));
BSP_LCD_SetTextColor(LCD_COLOR_CYAN);
BSP_LCD_DisplayStringAt(263, LINE(8), str, LEFT_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
}
break;
case AUDIO_STATE_STOP:
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
AudioState = AUDIO_STATE_IDLE;
audio_error = AUDIO_ERROR_IO;
break;
case AUDIO_STATE_NEXT:
if(++FilePos >= AUDIO_GetWavObjectNumber())
{
FilePos = 0;
}
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
AUDIO_PLAYER_Start(FilePos);
break;
case AUDIO_STATE_PREVIOUS:
if(--FilePos < 0)
{
FilePos = AUDIO_GetWavObjectNumber() - 1;
}
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
AUDIO_PLAYER_Start(FilePos);
break;
case AUDIO_STATE_PAUSE:
BSP_LCD_DisplayStringAt(250, LINE(14), (uint8_t *)" [PAUSE]", LEFT_MODE);
BSP_AUDIO_OUT_Pause();
AudioState = AUDIO_STATE_WAIT;
break;
case AUDIO_STATE_RESUME:
BSP_LCD_DisplayStringAt(250, LINE(14), (uint8_t *)" [PLAY ]", LEFT_MODE);
BSP_AUDIO_OUT_Resume();
AudioState = AUDIO_STATE_PLAY;
break;
case AUDIO_STATE_VOLUME_UP:
if( uwVolume <= 90)
{
uwVolume += 10;
}
BSP_AUDIO_OUT_SetVolume(uwVolume);
AudioState = AUDIO_STATE_PLAY;
break;
case AUDIO_STATE_VOLUME_DOWN:
if( uwVolume >= 10)
{
uwVolume -= 10;
}
BSP_AUDIO_OUT_SetVolume(uwVolume);
AudioState = AUDIO_STATE_PLAY;
break;
case AUDIO_STATE_WAIT:
case AUDIO_STATE_IDLE:
case AUDIO_STATE_INIT:
default:
/* Do Nothing */
break;
}
return audio_error;
}
/**
* @brief Stops Audio streaming.
* @param None
* @retval Audio error
*/
AUDIO_ErrorTypeDef AUDIO_PLAYER_Stop(void)
{
AudioState = AUDIO_STATE_STOP;
FilePos = 0;
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
f_close(&WavFile);
return AUDIO_ERROR_NONE;
}
/**
* @brief Probes the play back joystick state.
* @param state: Joystick state
* @retval None
*/
void AUDIO_PlaybackProbeKey(JOYState_TypeDef state)
{
/* Handle File List Selection */
if(state == JOY_UP)
{
if(AudioState == AUDIO_STATE_PLAY)
{
AudioState = AUDIO_STATE_VOLUME_UP;
}
}
else if(state == JOY_DOWN)
{
if(AudioState == AUDIO_STATE_PLAY)
{
AudioState = AUDIO_STATE_VOLUME_DOWN;
}
}
else if(state == JOY_RIGHT)
{
AudioState = AUDIO_STATE_NEXT;
}
else if(state == JOY_LEFT)
{
AudioState = AUDIO_STATE_PREVIOUS;
}
else if(state == JOY_SEL)
{
AudioState = (AudioState == AUDIO_STATE_WAIT) ? AUDIO_STATE_RESUME : AUDIO_STATE_PAUSE;
}
}
/**
* @brief Calculates the remaining file size and new position of the pointer.
* @param None
* @retval None
*/
void BSP_AUDIO_OUT_TransferComplete_CallBack(void)
{
if(AudioState == AUDIO_STATE_PLAY)
{
BufferCtl.state = BUFFER_OFFSET_FULL;
}
}
/**
* @brief Manages the DMA Half Transfer complete interrupt.
* @param None
* @retval None
*/
void BSP_AUDIO_OUT_HalfTransfer_CallBack(void)
{
if(AudioState == AUDIO_STATE_PLAY)
{
BufferCtl.state = BUFFER_OFFSET_HALF;
}
}
/*******************************************************************************
Static Functions
*******************************************************************************/
/**
* @brief Gets the file info.
* @param file_idx: File index
* @param info: Pointer to WAV file info
* @retval Audio error
*/
static AUDIO_ErrorTypeDef GetFileInfo(uint16_t file_idx, WAVE_FormatTypeDef *info)
{
uint32_t bytesread;
uint32_t duration;
uint8_t str[FILEMGR_FILE_NAME_SIZE + 20];
if(f_open(&WavFile, (char *)FileList.file[file_idx].name, FA_OPEN_EXISTING | FA_READ) == FR_OK)
{
/* Fill the buffer to Send */
if(f_read(&WavFile, info, sizeof(WaveFormat), (void *)&bytesread) == FR_OK)
{
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
sprintf((char *)str, "Playing file (%d/%d): %s",
file_idx + 1, FileList.ptr,
(char *)FileList.file[file_idx].name);
BSP_LCD_ClearStringLine(4);
BSP_LCD_DisplayStringAtLine(4, str);
BSP_LCD_SetTextColor(LCD_COLOR_CYAN);
sprintf((char *)str, "Sample rate : %d Hz", (int)(info->SampleRate));
BSP_LCD_ClearStringLine(6);
BSP_LCD_DisplayStringAtLine(6, str);
sprintf((char *)str, "Channels number : %d", info->NbrChannels);
BSP_LCD_ClearStringLine(7);
BSP_LCD_DisplayStringAtLine(7, str);
duration = info->FileSize / info->ByteRate;
sprintf((char *)str, "File Size : %d KB [%02d:%02d]", (int)(info->FileSize/1024), (int)(duration/60), (int)(duration%60));
BSP_LCD_ClearStringLine(8);
BSP_LCD_DisplayStringAtLine(8, str);
BSP_LCD_DisplayStringAt(263, LINE(8), (uint8_t *)"[00:00]", LEFT_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
return AUDIO_ERROR_NONE;
}
f_close(&WavFile);
}
return AUDIO_ERROR_IO;
}
/**
* @brief Initializes the Wave player.
* @param AudioFreq: Audio sampling frequency
* @retval None
*/
static uint8_t PlayerInit(uint32_t AudioFreq)
{
/* Initialize the Audio codec and all related peripherals (I2S, I2C, IOExpander, IOs...) */
if(BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_BOTH, uwVolume, AudioFreq) != 0)
{
return 1;
}
else
{
BSP_AUDIO_OUT_SetAudioFrameSlot(CODEC_AUDIOFRAME_SLOT_02);
return 0;
}
}