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/**
******************************************************************************
* @file audio_player_app.c
* @author MCD Application Team
* @brief Audio player application functions
******************************************************************************
* @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 "audio_player_app.h"
/** @addtogroup AUDIO_PLAYER_MODULE
* @{
*/
/** @defgroup AUDIO_APPLICATION
* @brief audio application routines
* @{
*/
/* External variables --------------------------------------------------------*/
/* Private typedef -----------------------------------------------------------*/
/* Private defines -----------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static FIL wav_file;
static osMessageQId AudioEvent = 0;
static osThreadId AudioThreadId = 0;
/* Private function prototypes -----------------------------------------------*/
static void Audio_Thread(void const * argument);
/* Private function prototypes -----------------------------------------------*/
static void Audio_Thread(void const * argument);
static void AUDIO_TransferComplete_CallBack(void);
static void AUDIO_HalfTransfer_CallBack(void);
static void AUDIO_Error_CallBack(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Initializes audio
* @param None.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_Init(uint8_t volume)
{
/* Try to Init Audio interface in different config in case of failure */
BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_AUTO, volume, I2S_AUDIOFREQ_48K);
/* Initialize internal audio structure */
haudio.out.state = AUDIOPLAYER_STOP;
haudio.out.mute = MUTE_OFF;
haudio.out.volume = volume;
/* Register audio BSP drivers callbacks */
AUDIO_IF_RegisterCallbacks(AUDIO_TransferComplete_CallBack,
AUDIO_HalfTransfer_CallBack,
AUDIO_Error_CallBack);
/* Create Audio Queue */
osMessageQDef(AUDIO_Queue, 1, uint16_t);
AudioEvent = osMessageCreate (osMessageQ(AUDIO_Queue), NULL);
/* Create Audio task */
osThreadDef(osAudio_Thread, Audio_Thread, osPriorityRealtime, 0, 512);
AudioThreadId = osThreadCreate (osThread(osAudio_Thread), NULL);
return AUDIOPLAYER_ERROR_NONE;
}
/**
* @brief Get audio state
* @param None.
* @retval Audio state.
*/
AUDIOPLAYER_StateTypdef AUDIOPLAYER_GetState(void)
{
return haudio.out.state;
}
/**
* @brief Get audio volume
* @param None.
* @retval Audio volume.
*/
uint32_t AUDIOPLAYER_GetVolume(void)
{
return haudio.out.volume;
}
/**
* @brief Set audio volume
* @param Volume: Volume level to be set in percentage from 0% to 100% (0 for
* Mute and 100 for Max volume level).
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_SetVolume(uint32_t volume)
{
if(BSP_AUDIO_OUT_SetVolume(volume) == AUDIO_OK)
{
haudio.out.volume = volume;
return AUDIOPLAYER_ERROR_NONE;
}
else
{
return AUDIOPLAYER_ERROR_HW;
}
}
/**
* @brief Play audio stream
* @param frequency: Audio frequency used to play the audio stream.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_Play(uint32_t frequency)
{
uint32_t numOfReadBytes;
haudio.out.state = AUDIOPLAYER_PLAY;
/* Fill whole buffer @ first time */
if(f_read(&wav_file,
&haudio.buff[0],
AUDIO_OUT_BUFFER_SIZE,
(void *)&numOfReadBytes) == FR_OK)
{
if(numOfReadBytes != 0)
{
BSP_AUDIO_OUT_Pause();
BSP_AUDIO_OUT_SetFrequency(frequency);
osThreadResume(AudioThreadId);
BSP_AUDIO_OUT_Play((uint16_t*)&haudio.buff[0], AUDIO_OUT_BUFFER_SIZE);
return AUDIOPLAYER_ERROR_NONE;
}
}
return AUDIOPLAYER_ERROR_IO;
}
/**
* @brief Audio player process
* @param None.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_Process(void)
{
switch(haudio.out.state)
{
case AUDIOPLAYER_START:
haudio.out.state = AUDIOPLAYER_PLAY;
break;
case AUDIOPLAYER_EOF:
AUDIOPLAYER_NotifyEndOfFile();
break;
case AUDIOPLAYER_ERROR:
AUDIOPLAYER_Stop();
break;
case AUDIOPLAYER_STOP:
case AUDIOPLAYER_PLAY:
default:
break;
}
return AUDIOPLAYER_ERROR_NONE;
}
/**
* @brief Audio player DeInit
* @param None.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_DeInit(void)
{
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
haudio.out.state = AUDIOPLAYER_STOP;
/* USB Clock recovering */
/* Select PLLI2S output as USB clock source */
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CK48;
PeriphClkInitStruct.Clk48ClockSelection = RCC_CK48CLKSOURCE_PLLI2SQ;
PeriphClkInitStruct.PLLI2S.PLLI2SM = 8;
PeriphClkInitStruct.PLLI2S.PLLI2SN = 192;
PeriphClkInitStruct.PLLI2S.PLLI2SQ = 4;
PeriphClkInitStruct.PLLI2S.PLLI2SR = 4;
if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
while(1);
}
BSP_AUDIO_OUT_Stop(CODEC_PDWN_HW);
BSP_AUDIO_OUT_DeInit();
f_close(&wav_file);
if(AudioEvent != 0)
{
vQueueDelete(AudioEvent);
AudioEvent = 0;
}
if(AudioThreadId != 0)
{
osThreadTerminate(AudioThreadId);
AudioThreadId = 0;
}
return AUDIOPLAYER_ERROR_NONE;
}
/**
* @brief Stop audio stream.
* @param None.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_Stop(void)
{
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
haudio.out.state = AUDIOPLAYER_STOP;
f_close(&wav_file);
if(AudioThreadId != 0)
{
osThreadSuspend(AudioThreadId);
}
return AUDIOPLAYER_ERROR_NONE;
}
/**
* @brief Pause Audio stream
* @param None.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_Pause(void)
{
if(AudioThreadId != 0)
{
osThreadSuspend(AudioThreadId);
}
haudio.out.state = AUDIOPLAYER_PAUSE;
BSP_AUDIO_OUT_Pause();
return AUDIOPLAYER_ERROR_NONE;
}
/**
* @brief Resume Audio stream
* @param None.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_Resume(void)
{
if(AudioThreadId != 0)
{
osThreadResume(AudioThreadId);
}
haudio.out.state = AUDIOPLAYER_PLAY;
BSP_AUDIO_OUT_Resume();
return AUDIOPLAYER_ERROR_NONE;
}
/**
* @brief Sets audio stream position
* @param position: stream position.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_SetPosition(uint32_t position)
{
long file_pos;
file_pos = f_size(&wav_file) / AUDIO_OUT_BUFFER_SIZE / 100;
file_pos *= (position * AUDIO_OUT_BUFFER_SIZE);
AUDIOPLAYER_Pause();
f_lseek(&wav_file, file_pos);
AUDIOPLAYER_Resume();
return AUDIOPLAYER_ERROR_NONE;
}
/**
* @brief Sets the volume at mute
* @param state: could be MUTE_ON to mute sound or MUTE_OFF to unmute
* the codec and restore previous volume level.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_Mute(uint8_t state)
{
BSP_AUDIO_OUT_SetMute(state);
return AUDIOPLAYER_ERROR_NONE;
}
/**
* @brief Get the wav file information.
* @param file: wav file.
* @param info: pointer to wav file structure
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_GetFileInfo(char* file, WAV_InfoTypedef* info)
{
uint32_t numOfReadBytes;
AUDIOPLAYER_ErrorTypdef ret = AUDIOPLAYER_ERROR_IO;
FIL fsfile;
if( f_open(&fsfile, file, FA_OPEN_EXISTING | FA_READ) == FR_OK)
{
/* Fill the buffer to Send */
if(f_read(&fsfile, info, sizeof(WAV_InfoTypedef), (void *)&numOfReadBytes) == FR_OK)
{
if((info->ChunkID == 0x46464952) && (info->AudioFormat == 1))
{
ret = AUDIOPLAYER_ERROR_NONE;
}
}
f_close(&fsfile);
}
return ret;
}
/**
* @brief Select wav file.
* @param file: wav file.
* @retval Audio state.
*/
AUDIOPLAYER_ErrorTypdef AUDIOPLAYER_SelectFile(char* file)
{
AUDIOPLAYER_ErrorTypdef ret = AUDIOPLAYER_ERROR_IO;
if( f_open(&wav_file, file, FA_OPEN_EXISTING | FA_READ) == FR_OK)
{
f_lseek(&wav_file, sizeof(WAV_InfoTypedef));
ret = AUDIOPLAYER_ERROR_NONE;
}
return ret;
}
/**
* @brief Get wav file progress.
* @param None
* @retval file progress.
*/
uint32_t AUDIOPLAYER_GetProgress(void)
{
return (wav_file.fptr);
}
/**
* @brief Manages the DMA Transfer complete interrupt.
* @param None
* @retval None
*/
static void AUDIO_TransferComplete_CallBack(void)
{
if(haudio.out.state == AUDIOPLAYER_PLAY)
{
BSP_AUDIO_OUT_ChangeBuffer((uint16_t*)&haudio.buff[0], AUDIO_OUT_BUFFER_SIZE /2);
osMessagePut ( AudioEvent, PLAY_BUFFER_OFFSET_FULL, 0);
}
}
/**
* @brief Manages the DMA Half Transfer complete interrupt.
* @param None
* @retval None
*/
static void AUDIO_HalfTransfer_CallBack(void)
{
if(haudio.out.state == AUDIOPLAYER_PLAY)
{
BSP_AUDIO_OUT_ChangeBuffer((uint16_t*)&haudio.buff[AUDIO_OUT_BUFFER_SIZE /2], AUDIO_OUT_BUFFER_SIZE /2);
osMessagePut ( AudioEvent, PLAY_BUFFER_OFFSET_HALF, 0);
}
}
/**
* @brief Manages the DMA FIFO error interrupt.
* @param None
* @retval None
*/
static void AUDIO_Error_CallBack(void)
{
haudio.out.state = AUDIOPLAYER_ERROR;
}
/**
* @brief Audio task
* @param argument: pointer that is passed to the thread function as start argument.
* @retval None
*/
static void Audio_Thread(void const * argument)
{
uint32_t numOfReadBytes;
osEvent event;
for(;;)
{
event = osMessageGet(AudioEvent, 100 );
if( event.status == osEventMessage )
{
if(haudio.out.state == AUDIOPLAYER_PLAY)
{
switch(event.value.v)
{
case PLAY_BUFFER_OFFSET_HALF:
if(f_read(&wav_file,
&haudio.buff[0],
AUDIO_OUT_BUFFER_SIZE/2,
(void *)&numOfReadBytes) == FR_OK)
{
if(numOfReadBytes == 0)
{
haudio.out.state = AUDIOPLAYER_EOF;
}
}
else
{
haudio.out.state = AUDIOPLAYER_ERROR;
}
break;
case PLAY_BUFFER_OFFSET_FULL:
if(f_read(&wav_file,
&haudio.buff[AUDIO_OUT_BUFFER_SIZE/2],
AUDIO_OUT_BUFFER_SIZE/2,
(void *)&numOfReadBytes) == FR_OK)
{
if(numOfReadBytes == 0)
{
haudio.out.state = AUDIOPLAYER_EOF;
}
}
else
{
haudio.out.state = AUDIOPLAYER_ERROR;
}
break;
default:
break;
}
}
}
}
}
/**
* @}
*/
/**
* @}
*/