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/**
******************************************************************************
* @file AUDIO_RECORDER_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_recorder_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;
static WAV_InfoTypedef AudioInfo;
static uint8_t pHeaderBuff[44];
/* Private function prototypes -----------------------------------------------*/
static void Audio_Thread(void const * argument);
static uint32_t WavProcess_EncInit(uint32_t Freq, uint8_t* pHeader);
static uint32_t WavProcess_HeaderInit(uint8_t* pHeader, WAV_InfoTypedef* pAudioInfoStruct);
static uint32_t WavProcess_HeaderUpdate(uint8_t* pHeader, WAV_InfoTypedef* pAudioInfoStruct);
static void AUDIO_TransferComplete_CallBack(void);
static void AUDIO_HalfTransfer_CallBack(void);
static void AUDIO_Error_CallBack(void);
extern void _cbNotifyStateChange (void) ;
/* Private functions ---------------------------------------------------------*/
/**
* @brief Initializes audio
* @param None.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_Init(uint8_t volume)
{
/* Initialize internal audio structure */
haudio.in.volume = DEFAULT_REC_AUDIO_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, osPriorityNormal, 0, 1024);
AudioThreadId = osThreadCreate (osThread(osAudio_Thread), NULL);
haudio.in.state = AUDIO_RECORDER_IDLE;
return AUDIO_RECORDER_ERROR_NONE;
}
/**
* @brief Get audio state
* @param None.
* @retval Audio state.
*/
AUDIO_RECORDER_StateTypdef AUDIO_RECORDER_GetState(void)
{
return haudio.in.state;
}
/**
* @brief Get audio volume
* @param None.
* @retval Audio volume.
*/
uint32_t AUDIO_RECORDER_GetVolume(void)
{
return haudio.in.volume;
}
/**
* @brief Play audio stream
* @param frequency: Audio frequency used to play the audio stream.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_StartRec(uint32_t frequency)
{
uint32_t byteswritten = 0;
/* Initialize header file */
WavProcess_EncInit(DEFAULT_AUDIO_IN_FREQ, pHeaderBuff);
haudio.ppcm = 0;
/* Write header file */
if(f_write(&wav_file, pHeaderBuff, 44, (void*)&byteswritten) == FR_OK)
{
if(byteswritten != 0)
{
BSP_AUDIO_IN_Init(DEFAULT_AUDIO_IN_FREQ, DEFAULT_AUDIO_IN_BIT_RESOLUTION, DEFAULT_AUDIO_IN_CHANNEL_NBR);
BSP_AUDIO_IN_Record((uint16_t*)&haudio.pdm[0], AUDIO_IN_PDM_BUFFER_SIZE);
if(haudio.in.state == AUDIO_RECORDER_SUSPENDED)
{
osThreadResume(AudioThreadId);
}
haudio.in.state = AUDIO_RECORDER_RECORDING;
haudio.in.fptr = byteswritten;
return AUDIO_RECORDER_ERROR_NONE;
}
}
return AUDIO_RECORDER_ERROR_IO;
}
/**
* @brief Get the wav file information.
* @param file: wav file.
* @param info: pointer to wav file structure
* @retval Audio state.
*/
WAV_InfoTypedef* AUDIO_RECORDER_GetFileInfo(void)
{
return &AudioInfo;
}
/**
* @brief Erase audio file from storage unit
* @param None
* @retval None
*/
void AUDIO_RECORDER_RemoveAudioFile(char const *fname)
{
f_unlink(fname);
}
/**
* @brief Select wav file.
* @param file: wav file.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_SelectFile(char* file, uint8_t mode)
{
int numOfReadBytes;
AUDIO_RECORDER_ErrorTypdef ret = AUDIO_RECORDER_ERROR_IO;
if( f_open(&wav_file, file, mode) == FR_OK)
{
if (mode & FA_READ)
{
if(f_read(&wav_file, &AudioInfo, sizeof(WAV_InfoTypedef), (void *)&numOfReadBytes) == FR_OK)
{
ret = AUDIO_RECORDER_ERROR_NONE;
}
}
}
return ret;
}
/**
* @brief Play audio stream
* @param frequency: Audio frequency used to play the audio stream.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_Play(uint32_t frequency)
{
uint32_t numOfReadBytes;
BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_AUTO, DEFAULT_REC_AUDIO_VOLUME, DEFAULT_AUDIO_IN_FREQ);
BSP_AUDIO_OUT_SetAudioFrameSlot(CODEC_AUDIOFRAME_SLOT_02);
/* Fill whole buffer @ first time */
if(f_read(&wav_file,
&haudio.buff[0],
AUDIO_OUT_BUFFER_SIZE,
(void *)&numOfReadBytes) == FR_OK)
{
if(numOfReadBytes != 0)
{
if(haudio.in.state == AUDIO_RECORDER_SUSPENDED)
{
osThreadResume(AudioThreadId);
}
haudio.in.state = AUDIO_RECORDER_PLAYING;
BSP_AUDIO_OUT_Play((uint16_t*)&haudio.buff[0], AUDIO_OUT_BUFFER_SIZE);
return AUDIO_RECORDER_ERROR_NONE;
}
}
return AUDIO_RECORDER_ERROR_IO;
}
/**
* @brief Audio player DeInit
* @param None.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_DeInit(void)
{
if(haudio.in.state == AUDIO_RECORDER_RECORDING)
{
BSP_AUDIO_IN_Stop();
BSP_AUDIO_IN_DeInit();
f_close(&wav_file);
}
if(haudio.in.state == AUDIO_RECORDER_PLAYING)
{
BSP_AUDIO_OUT_Stop(CODEC_PDWN_HW);
BSP_AUDIO_OUT_DeInit();
f_close(&wav_file);
}
haudio.in.state = AUDIO_RECORDER_IDLE;
if(AudioEvent != 0)
{
vQueueDelete(AudioEvent);
AudioEvent = 0;
}
if(AudioThreadId != 0)
{
osThreadTerminate(AudioThreadId);
AudioThreadId = 0;
}
return AUDIO_RECORDER_ERROR_NONE;
}
/**
* @brief Stop audio stream.
* @param None.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_StopRec(void)
{
uint32_t byteswritten = 0;
AUDIO_RECORDER_ErrorTypdef audio_error = AUDIO_RECORDER_ERROR_IO;
BSP_AUDIO_IN_Stop();
haudio.in.state = AUDIO_RECORDER_IDLE;
if(f_lseek(&wav_file, 0) == FR_OK)
{
/* Update the wav file header save it into wav file */
WavProcess_HeaderUpdate(pHeaderBuff, &AudioInfo);
if(f_write(&wav_file, pHeaderBuff, sizeof(WAV_InfoTypedef), (void*)&byteswritten) == FR_OK)
{
audio_error = AUDIO_RECORDER_ERROR_NONE;
}
}
haudio.in.state = AUDIO_RECORDER_SUSPENDED;
f_close(&wav_file);
_cbNotifyStateChange();
if(AudioThreadId != 0)
{
osThreadSuspend(AudioThreadId);
}
return audio_error;
}
/**
* @brief Stop audio stream.
* @param None.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_StopPlayer(void)
{
BSP_AUDIO_OUT_Stop(CODEC_PDWN_HW);
BSP_AUDIO_OUT_DeInit();
haudio.in.state = AUDIO_RECORDER_SUSPENDED;
f_close(&wav_file);
_cbNotifyStateChange();
if(AudioThreadId != 0)
{
osThreadSuspend(AudioThreadId);
}
return AUDIO_RECORDER_ERROR_NONE;
}
/**
* @brief Pause Audio stream
* @param None.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_PauseResume(void)
{
if(haudio.in.state == AUDIO_RECORDER_PLAYING)
{
osThreadSuspend(AudioThreadId);
BSP_AUDIO_OUT_Pause();
haudio.in.state = AUDIO_RECORDER_PLAY_PAUSE;
}
else if(haudio.in.state == AUDIO_RECORDER_RECORDING)
{
osThreadSuspend(AudioThreadId);
BSP_AUDIO_IN_Pause();
haudio.in.state = AUDIO_RECORDER_RECORD_PAUSE;
}
else if(haudio.in.state == AUDIO_RECORDER_PLAY_PAUSE)
{
osThreadResume(AudioThreadId);
BSP_AUDIO_OUT_Resume();
haudio.in.state = AUDIO_RECORDER_PLAYING;
}
else if(haudio.in.state == AUDIO_RECORDER_RECORD_PAUSE)
{
osThreadResume(AudioThreadId);
BSP_AUDIO_IN_Resume();
haudio.in.state = AUDIO_RECORDER_RECORDING;
}
return AUDIO_RECORDER_ERROR_NONE;
}
/**
* @brief Resume Audio stream
* @param None.
* @retval Audio state.
*/
AUDIO_RECORDER_ErrorTypdef AUDIO_RECORDER_Resume(void)
{
if(haudio.in.state == AUDIO_RECORDER_PLAY_PAUSE)
{
osThreadResume(AudioThreadId);
BSP_AUDIO_OUT_Resume();
haudio.in.state = AUDIO_RECORDER_PLAYING;
}
else if(haudio.in.state == AUDIO_RECORDER_RECORD_PAUSE)
{
osThreadResume(AudioThreadId);
BSP_AUDIO_IN_Resume();
haudio.in.state = AUDIO_RECORDER_RECORDING;
}
return AUDIO_RECORDER_ERROR_NONE;
}
/**
* @brief Calculates the remaining file size and new position of the pointer.
* @param None
* @retval None
*/
void BSP_AUDIO_IN_TransferComplete_CallBack(void)
{
/* PDM to PCM data convert */
BSP_AUDIO_IN_PDMToPCM((uint16_t*)&haudio.pdm[AUDIO_IN_PDM_BUFFER_SIZE/2],
(uint16_t*)&haudio.buff[haudio.ppcm]);
haudio.ppcm += AUDIO_IN_PDM_BUFFER_SIZE/4;
if (haudio.ppcm == AUDIO_IN_BUFFER_SIZE/2)
{
osMessagePut ( AudioEvent, REC_BUFFER_OFFSET_HALF, 0);
}
else if (haudio.ppcm >= AUDIO_IN_BUFFER_SIZE)
{
osMessagePut ( AudioEvent, REC_BUFFER_OFFSET_FULL, 0);
haudio.ppcm = 0;
}
}
/**
* @brief Manages the DMA Half Transfer complete interrupt.
* @param None
* @retval None
*/
void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
{
/* PDM to PCM data convert */
BSP_AUDIO_IN_PDMToPCM((uint16_t*)&haudio.pdm[0],
(uint16_t*)&haudio.buff[haudio.ppcm]);
haudio.ppcm += AUDIO_IN_PDM_BUFFER_SIZE/4;
if (haudio.ppcm == AUDIO_IN_BUFFER_SIZE/2)
{
osMessagePut ( AudioEvent, REC_BUFFER_OFFSET_HALF, 0);
}
else if (haudio.ppcm >= AUDIO_IN_BUFFER_SIZE)
{
osMessagePut ( AudioEvent, REC_BUFFER_OFFSET_FULL, 0);
haudio.ppcm = 0;
}
}
/**
* @brief Manages the DMA FIFO error interrupt.
* @param None
* @retval None
*/
void BSP_AUDIO_IN_Error_CallBack(void)
{
haudio.in.state = AUDIO_RECORDER_ERROR;
}
/**
* @brief Manages the DMA Transfer complete interrupt.
* @param None
* @retval None
*/
static void AUDIO_TransferComplete_CallBack(void)
{
if(haudio.in.state == AUDIO_RECORDER_PLAYING)
{
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.in.state == AUDIO_RECORDER_PLAYING)
{
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.in.state = AUDIO_RECORDER_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, numOfWrittenBytes;
osEvent event;
for(;;)
{
event = osMessageGet(AudioEvent, 100 );
if( event.status == osEventMessage )
{
if(haudio.in.state == AUDIO_RECORDER_PLAYING)
{
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)
{
AUDIO_RECORDER_StopPlayer();
}
}
else
{
AUDIO_RECORDER_StopPlayer();
}
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)
{
AUDIO_RECORDER_StopPlayer();
}
}
else
{
AUDIO_RECORDER_StopPlayer();
}
break;
default:
break;
}
}
/* Recording .... */
if(haudio.in.state == AUDIO_RECORDER_RECORDING)
{
switch(event.value.v)
{
case REC_BUFFER_OFFSET_HALF:
if(f_write(&wav_file, (uint8_t*)(haudio.buff),
AUDIO_IN_BUFFER_SIZE/2,
(void*)&numOfWrittenBytes) == FR_OK)
{
if(numOfWrittenBytes == 0)
{
AUDIO_RECORDER_StopRec();
}
}
else
{
AUDIO_RECORDER_StopRec();
}
haudio.in.fptr += numOfWrittenBytes;
break;
case REC_BUFFER_OFFSET_FULL:
if(f_write(&wav_file, (uint8_t*)(haudio.buff + AUDIO_IN_BUFFER_SIZE/2),
AUDIO_IN_BUFFER_SIZE/2,
(void*)&numOfWrittenBytes) == FR_OK)
{
if(numOfWrittenBytes == 0)
{
AUDIO_RECORDER_StopRec();
}
}
else
{
AUDIO_RECORDER_StopRec();
}
haudio.in.fptr += numOfWrittenBytes;
break;
default:
break;
}
}
}
}
}
/**
* @brief Return Elapsed recording Time
* @param None
* @retval Elapsed Time in millisecond
*/
uint32_t AUDIO_RECORDER_GetElapsedTime(void)
{
uint32_t duration;
duration = haudio.in.fptr / AudioInfo.ByteRate;
return duration;
}
/**
* @brief Return remain playing time
* @param None
* @retval Elapsed Time in millisecond
*/
uint32_t AUDIO_RECORDER_GetPlayedTime(void)
{
uint32_t duration;
duration = (wav_file.fptr) / AudioInfo.ByteRate;
return duration;
}
/**
* @brief Return remain playing time
* @param None
* @retval Elapsed Time in millisecond
*/
uint32_t AUDIO_RECORDER_GetTotalTime(void)
{
uint32_t duration;
duration = (f_size(&wav_file)) / AudioInfo.ByteRate;
return duration;
}
/*******************************************************************************
Static Functions
*******************************************************************************/
/**
* @brief Encoder initialization.
* @param Freq: Sampling frequency.
* @param pHeader: Pointer to the WAV file header to be written.
* @retval 0 if success, !0 else.
*/
static uint32_t WavProcess_EncInit(uint32_t Freq, uint8_t *pHeader)
{
/* Initialize the encoder structure */
AudioInfo.SampleRate = Freq; /* Audio sampling frequency */
AudioInfo.NbrChannels = 2; /* Number of channels: 1:Mono or 2:Stereo */
AudioInfo.BitPerSample = 16; /* Number of bits per sample (16, 24 or 32) */
AudioInfo.FileSize = 0x001D4C00; /* Total length of useful audio data (payload) */
AudioInfo.SubChunk1Size = 44; /* The file header chunk size */
AudioInfo.ByteRate = (AudioInfo.SampleRate * \
(AudioInfo.BitPerSample/8) * \
AudioInfo.NbrChannels); /* Number of bytes per second (sample rate * block align) */
AudioInfo.BlockAlign = AudioInfo.NbrChannels * \
(AudioInfo.BitPerSample/8); /* channels * bits/sample / 8 */
/* Parse the wav file header and extract required information */
if(WavProcess_HeaderInit(pHeader, &AudioInfo))
{
return 1;
}
return 0;
}
/**
* @brief Initialize the wave header file
* @param pHeader: Header Buffer to be filled
* @param pAudioInfoStruct: Pointer to the wave structure to be filled.
* @retval 0 if passed, !0 if failed.
*/
static uint32_t WavProcess_HeaderInit(uint8_t* pHeader, WAV_InfoTypedef* pAudioInfoStruct)
{
/* Write chunkID, must be 'RIFF' ------------------------------------------*/
pHeader[0] = 'R';
pHeader[1] = 'I';
pHeader[2] = 'F';
pHeader[3] = 'F';
/* Write the file length ---------------------------------------------------*/
/* The sampling time: this value will be written back at the end of the
recording operation. Example: 661500 Bytes = 0x000A17FC, byte[7]=0x00, byte[4]=0xFC */
pHeader[4] = 0x00;
pHeader[5] = 0x4C;
pHeader[6] = 0x1D;
pHeader[7] = 0x00;
/* Write the file format, must be 'WAVE' -----------------------------------*/
pHeader[8] = 'W';
pHeader[9] = 'A';
pHeader[10] = 'V';
pHeader[11] = 'E';
/* Write the format chunk, must be'fmt ' -----------------------------------*/
pHeader[12] = 'f';
pHeader[13] = 'm';
pHeader[14] = 't';
pHeader[15] = ' ';
/* Write the length of the 'fmt' data, must be 0x10 ------------------------*/
pHeader[16] = 0x10;
pHeader[17] = 0x00;
pHeader[18] = 0x00;
pHeader[19] = 0x00;
/* Write the audio format, must be 0x01 (PCM) ------------------------------*/
pHeader[20] = 0x01;
pHeader[21] = 0x00;
/* Write the number of channels, ie. 0x01 (Mono) ---------------------------*/
pHeader[22] = pAudioInfoStruct->NbrChannels;
pHeader[23] = 0x00;
/* Write the Sample Rate in Hz ---------------------------------------------*/
/* Write Little Endian ie. 8000 = 0x00001F40 => byte[24]=0x40, byte[27]=0x00*/
pHeader[24] = (uint8_t)((pAudioInfoStruct->SampleRate & 0xFF));
pHeader[25] = (uint8_t)((pAudioInfoStruct->SampleRate >> 8) & 0xFF);
pHeader[26] = (uint8_t)((pAudioInfoStruct->SampleRate >> 16) & 0xFF);
pHeader[27] = (uint8_t)((pAudioInfoStruct->SampleRate >> 24) & 0xFF);
/* Write the Byte Rate -----------------------------------------------------*/
pHeader[28] = (uint8_t)((pAudioInfoStruct->ByteRate & 0xFF));
pHeader[29] = (uint8_t)((pAudioInfoStruct->ByteRate >> 8) & 0xFF);
pHeader[30] = (uint8_t)((pAudioInfoStruct->ByteRate >> 16) & 0xFF);
pHeader[31] = (uint8_t)((pAudioInfoStruct->ByteRate >> 24) & 0xFF);
/* Write the block alignment -----------------------------------------------*/
pHeader[32] = pAudioInfoStruct->BlockAlign;
pHeader[33] = 0x00;
/* Write the number of bits per sample -------------------------------------*/
pHeader[34] = pAudioInfoStruct->BitPerSample;
pHeader[35] = 0x00;
/* Write the Data chunk, must be 'data' ------------------------------------*/
pHeader[36] = 'd';
pHeader[37] = 'a';
pHeader[38] = 't';
pHeader[39] = 'a';
/* Write the number of sample data -----------------------------------------*/
/* This variable will be written back at the end of the recording operation */
pHeader[40] = 0x00;
pHeader[41] = 0x4C;
pHeader[42] = 0x1D;
pHeader[43] = 0x00;
/* Return 0 if all operations are OK */
return 0;
}
/**
* @brief Initialize the wave header file
* @param pHeader: Header Buffer to be filled
* @param pAudioInfoStruct: Pointer to the wave structure to be filled.
* @retval 0 if passed, !0 if failed.
*/
static uint32_t WavProcess_HeaderUpdate(uint8_t* pHeader, WAV_InfoTypedef* pAudioInfoStruct)
{
/* Write the file length ---------------------------------------------------*/
/* The sampling time: this value will be written back at the end of the
recording operation. Example: 661500 Bytes = 0x000A17FC, byte[7]=0x00, byte[4]=0xFC */
pHeader[4] = (uint8_t)(haudio.in.fptr);
pHeader[5] = (uint8_t)(haudio.in.fptr >> 8);
pHeader[6] = (uint8_t)(haudio.in.fptr >> 16);
pHeader[7] = (uint8_t)(haudio.in.fptr >> 24);
/* Write the number of sample data -----------------------------------------*/
/* This variable will be written back at the end of the recording operation */
haudio.in.fptr -=44;
pHeader[40] = (uint8_t)(haudio.in.fptr);
pHeader[41] = (uint8_t)(haudio.in.fptr >> 8);
pHeader[42] = (uint8_t)(haudio.in.fptr >> 16);
pHeader[43] = (uint8_t)(haudio.in.fptr >> 24);
/* Return 0 if all operations are OK */
return 0;
}
/**
* @}
*/
/**
* @}
*/
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