stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c File Reference

#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include "stm32f4_discovery_audio.h"
#include "picovoice.h"

Include dependency graph for stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c:

Go to the source code of this file.

Macros
#define	AUDIO_IN_PCM_BUFFER_SIZE   ((uint32_t)(PV_AUDIO_REC_AUDIO_FREQUENCY / 1000 * PV_AUDIO_REC_CHANNEL_NUMBER))
#define	AUDIO_IN_PDM_BUFFER_SIZE   ((uint32_t)(128 * PV_AUDIO_REC_AUDIO_FREQUENCY / 16000 * PV_AUDIO_REC_CHANNEL_NUMBER))
#define	PV_AUDIO_REC_AUDIO_FREQUENCY   (16000U)
#define	PV_AUDIO_REC_CHANNEL_NUMBER   (1)
#define	PV_AUDIO_REC_RECORD_BUFFER_SIZE   (512)
#define	PV_AUDIO_REC_VOLUME_LEVEL   (100)

Functions
void	BSP_AUDIO_IN_HalfTransfer_CallBack (void)
	Manages the DMA Half Transfer complete event. More...
void	BSP_AUDIO_IN_TransferComplete_CallBack (void)
	User callback when record buffer is filled. More...
void	pv_audio_rec_deinit (void)
const int16_t *	pv_audio_rec_get_new_buffer (void)
pv_status_t	pv_audio_rec_init (void)
pv_status_t	pv_audio_rec_start (void)

Variables
static int32_t	buffer_index = 0
static int32_t	last_read_index = -1
static int16_t	ping_pong_buffer [2][PV_AUDIO_REC_RECORD_BUFFER_SIZE]
struct {
uint32_t   audio_frequency
uint32_t   channel_number
bool   is_recording
uint32_t   record_buffer_size
uint16_t *   record_pcm_buffer
}	pv_audio_rec
static int32_t	read_index = 1
static uint16_t	record_pcm_buffer [2 *AUDIO_IN_PCM_BUFFER_SIZE]
static uint16_t	record_pdm_buffer [AUDIO_IN_PDM_BUFFER_SIZE]
static int32_t	write_index = 0

Macro Definition Documentation

AUDIO_IN_PCM_BUFFER_SIZE

#define AUDIO_IN_PCM_BUFFER_SIZE   ((uint32_t)(PV_AUDIO_REC_AUDIO_FREQUENCY / 1000 * PV_AUDIO_REC_CHANNEL_NUMBER))

Definition at line 25 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

AUDIO_IN_PDM_BUFFER_SIZE

#define AUDIO_IN_PDM_BUFFER_SIZE   ((uint32_t)(128 * PV_AUDIO_REC_AUDIO_FREQUENCY / 16000 * PV_AUDIO_REC_CHANNEL_NUMBER))

Definition at line 26 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

PV_AUDIO_REC_AUDIO_FREQUENCY

#define PV_AUDIO_REC_AUDIO_FREQUENCY   (16000U)

Definition at line 20 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

PV_AUDIO_REC_CHANNEL_NUMBER

#define PV_AUDIO_REC_CHANNEL_NUMBER   (1)

Definition at line 21 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

PV_AUDIO_REC_RECORD_BUFFER_SIZE

#define PV_AUDIO_REC_RECORD_BUFFER_SIZE   (512)

Definition at line 22 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

PV_AUDIO_REC_VOLUME_LEVEL

#define PV_AUDIO_REC_VOLUME_LEVEL   (100)

Definition at line 23 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

Function Documentation

pv_audio_rec_deinit()

void pv_audio_rec_deinit

(

void

)

Definition at line 108 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

pv_audio_rec_get_new_buffer()

const int16_t* pv_audio_rec_get_new_buffer

(

void

)

Definition at line 68 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

pv_audio_rec_init()

pv_status_t pv_audio_rec_init

(

void

)

Definition at line 45 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

pv_audio_rec_start()

pv_status_t pv_audio_rec_start

(

void

)

Definition at line 60 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

Variable Documentation

audio_frequency

uint32_t audio_frequency

Definition at line 39 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

buffer_index

int32_t buffer_index = 0

static

Definition at line 35 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

channel_number

uint32_t channel_number

Definition at line 38 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

is_recording

bool is_recording

Definition at line 42 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

last_read_index

int32_t last_read_index = -1

static

Definition at line 32 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

ping_pong_buffer

int16_t ping_pong_buffer[2][PV_AUDIO_REC_RECORD_BUFFER_SIZE]

static

Definition at line 30 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

pv_audio_rec

struct { ... } pv_audio_rec

read_index

int32_t read_index = 1

static

Definition at line 33 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

record_buffer_size

uint32_t record_buffer_size

Definition at line 40 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

record_pcm_buffer

uint16_t* record_pcm_buffer

static

Definition at line 29 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

record_pdm_buffer

uint16_t record_pdm_buffer[AUDIO_IN_PDM_BUFFER_SIZE]

static

Definition at line 28 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.

write_index

int32_t write_index = 0

static

Definition at line 34 of file stm32f407/stm32f407g-disc1/Src/pv_audio_rec.c.