582 lines
15 KiB
C
582 lines
15 KiB
C
#include "asm/includes.h"
|
|
#include "media/includes.h"
|
|
#include "system/includes.h"
|
|
#include "device/uac_stream.h"
|
|
#include "audio_enc.h"
|
|
#include "app_main.h"
|
|
#include "app_config.h"
|
|
#include "user_cfg_id.h"
|
|
#include "application/audio_echo_reverb.h"
|
|
|
|
#if TCFG_PC_ENABLE
|
|
|
|
/*usb mic的数据是否经过AEC,包括里面的ANS模块*/
|
|
#define USB_MIC_AEC_EN 0
|
|
#define USB_MIC_SRC_ENABLE 1 //同步以及变采样使能
|
|
|
|
#if USB_MIC_AEC_EN
|
|
#include "aec_user.h"
|
|
#endif/*USB_MIC_AEC_EN*/
|
|
|
|
#if USB_MIC_SRC_ENABLE
|
|
#ifdef CONFIG_MEDIA_DEVELOP_ENABLE
|
|
#include "audio_track.h"
|
|
#endif
|
|
#include "Resample_api.h"
|
|
#endif/*USB_MIC_SRC_ENABLE*/
|
|
|
|
#define PCM_ENC2USB_OUTBUF_LEN (5 * 1024)
|
|
|
|
/* #define USB_MIC_BUF_NUM 3 */
|
|
/* #define USB_MIC_CH_NUM 1 */
|
|
/* #define USB_MIC_IRQ_POINTS 256 */
|
|
/* #define USB_MIC_BUFS_SIZE (USB_MIC_CH_NUM * USB_MIC_BUF_NUM * USB_MIC_IRQ_POINTS) */
|
|
|
|
#define USB_MIC_STOP 0x00
|
|
#define USB_MIC_START 0x01
|
|
|
|
extern struct audio_adc_hdl adc_hdl;
|
|
extern u16 uac_get_mic_vol(const u8 usb_id);
|
|
extern int usb_output_sample_rate();
|
|
#if USB_MIC_SRC_ENABLE
|
|
typedef struct {
|
|
u8 start;
|
|
u8 busy;
|
|
u16 in_sample_rate;
|
|
u32 *runbuf;
|
|
s16 output[320 * 3 + 16];
|
|
RS_STUCT_API *ops;
|
|
void *audio_track;
|
|
u8 input_ch;
|
|
} usb_mic_sw_src_t;
|
|
static usb_mic_sw_src_t *usb_mic_src = NULL;
|
|
#endif/*USB_MIC_SRC_ENABLE*/
|
|
|
|
struct _usb_mic_hdl {
|
|
struct audio_adc_output_hdl adc_output;
|
|
struct adc_mic_ch mic_ch;
|
|
struct audio_adc_ch linein_ch;
|
|
/* s16 *adc_buf;//[USB_MIC_BUFS_SIZE]; */
|
|
enum enc_source source;
|
|
|
|
cbuffer_t output_cbuf;
|
|
u8 *output_buf;//[PCM_ENC2USB_OUTBUF_LEN];
|
|
u8 rec_tx_channels;
|
|
u8 mic_data_ok;/*mic数据等到一定长度再开始发送*/
|
|
u8 status;
|
|
u8 drop_data; //用来丢掉刚开mic的前几帧数据
|
|
#if TCFG_USB_MIC_ECHO_ENABLE
|
|
ECHO_API_STRUCT *p_echo_hdl;
|
|
#endif
|
|
|
|
|
|
|
|
};
|
|
|
|
static struct _usb_mic_hdl *usb_mic_hdl = NULL;
|
|
#if TCFG_USB_MIC_ECHO_ENABLE
|
|
ECHO_PARM_SET usbmic_echo_parm_default = {
|
|
.delay = 200, //回声的延时时间 0-300ms
|
|
.decayval = 50, // 0-70%
|
|
.direct_sound_enable = 1, //直达声使能 0/1
|
|
.filt_enable = 1, //发散滤波器使能
|
|
};
|
|
EF_REVERB_FIX_PARM usbmic_echo_fix_parm_default = {
|
|
.wetgain = 2048, ////湿声增益:[0:4096]
|
|
.drygain = 4096, ////干声增益: [0:4096]
|
|
.sr = MIC_EFFECT_SAMPLERATE, ////采样率
|
|
.max_ms = 200, ////所需要的最大延时,影响 need_buf 大小
|
|
};
|
|
#endif
|
|
static int usb_audio_mic_sync(u32 data_size)
|
|
{
|
|
#if 0
|
|
int change_point = 0;
|
|
|
|
if (data_size > __this->rec_top_size) {
|
|
change_point = -1;
|
|
} else if (data_size < __this->rec_bottom_size) {
|
|
change_point = 1;
|
|
}
|
|
|
|
if (change_point) {
|
|
struct audio_pcm_src src;
|
|
src.resample = 0;
|
|
src.ratio_i = (1024) * 2;
|
|
src.ratio_o = (1024 + change_point) * 2;
|
|
src.convert = 1;
|
|
dev_ioctl(__this->rec_dev, AUDIOC_PCM_RATE_CTL, (u32)&src);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usb_audio_mic_tx_handler(int event, void *data, int len)
|
|
{
|
|
if (usb_mic_hdl == NULL) {
|
|
return 0;
|
|
}
|
|
if (usb_mic_hdl->status == USB_MIC_STOP) {
|
|
return 0;
|
|
}
|
|
|
|
int i = 0;
|
|
int r_len = 0;
|
|
u8 ch = 0;
|
|
u8 double_read = 0;
|
|
|
|
/* int rlen = 0; */
|
|
|
|
if (usb_mic_hdl->mic_data_ok == 0) {
|
|
if (usb_mic_hdl->output_cbuf.data_len > (PCM_ENC2USB_OUTBUF_LEN / 4)) {
|
|
usb_mic_hdl->mic_data_ok = 1;
|
|
}
|
|
//y_printf("mic_tx NULL\n");
|
|
memset(data, 0, len);
|
|
return len;
|
|
}
|
|
|
|
/* usb_audio_mic_sync(size); */
|
|
if (usb_mic_hdl->rec_tx_channels == 2) {
|
|
len = cbuf_read(&usb_mic_hdl->output_cbuf, data, len / 2);
|
|
s16 *tx_pcm = (s16 *)data;
|
|
int cnt = len / 2;
|
|
for (cnt = len / 2; cnt >= 2;) {
|
|
tx_pcm[cnt - 1] = tx_pcm[cnt / 2 - 1];
|
|
tx_pcm[cnt - 2] = tx_pcm[cnt / 2 - 1];
|
|
cnt -= 2;
|
|
}
|
|
len *= 2;
|
|
} else {
|
|
len = cbuf_read(&usb_mic_hdl->output_cbuf, data, len);
|
|
}
|
|
return len;
|
|
}
|
|
|
|
|
|
int usb_audio_mic_write(void *data, u16 len)
|
|
{
|
|
int wlen = len;
|
|
if (usb_mic_hdl) {
|
|
if (usb_mic_hdl->status == USB_MIC_STOP) {
|
|
return len;
|
|
}
|
|
|
|
int outlen = len;
|
|
s16 *obuf = data;
|
|
|
|
#if USB_MIC_SRC_ENABLE
|
|
if (usb_mic_src && usb_mic_src->start) {
|
|
usb_mic_src->busy = 1;
|
|
#ifdef CONFIG_MEDIA_DEVELOP_ENABLE
|
|
u32 sr = usb_output_sample_rate();
|
|
usb_mic_src->ops->set_sr(usb_mic_src->runbuf, sr);
|
|
#endif
|
|
outlen = usb_mic_src->ops->run(usb_mic_src->runbuf, data, len >> 1, usb_mic_src->output);
|
|
usb_mic_src->busy = 0;
|
|
ASSERT(outlen <= (sizeof(usb_mic_src->output) >> 1));
|
|
//printf("16->48k:%d,%d,%d\n",len >> 1,outlen,sizeof(usb_mic_src->output));
|
|
obuf = usb_mic_src->output;
|
|
outlen = outlen << 1;
|
|
}
|
|
#endif/*USB_MIC_SRC_ENABLE*/
|
|
|
|
wlen = cbuf_write(&usb_mic_hdl->output_cbuf, obuf, outlen);
|
|
if (wlen != outlen) {
|
|
r_printf("usb_mic write full:%d-%d\n", wlen, outlen);
|
|
}
|
|
}
|
|
return wlen;
|
|
}
|
|
|
|
static void adc_output_to_cbuf(void *priv, s16 *data, int len)
|
|
{
|
|
if (usb_mic_hdl == NULL) {
|
|
return ;
|
|
}
|
|
if (usb_mic_hdl->status == USB_MIC_STOP) {
|
|
return ;
|
|
}
|
|
|
|
|
|
|
|
switch (usb_mic_hdl->source) {
|
|
case ENCODE_SOURCE_MIC:
|
|
case ENCODE_SOURCE_LINE0_LR:
|
|
case ENCODE_SOURCE_LINE1_LR:
|
|
case ENCODE_SOURCE_LINE2_LR: {
|
|
|
|
#if USB_MIC_SRC_ENABLE
|
|
#ifdef CONFIG_MEDIA_DEVELOP_ENABLE
|
|
if (usb_mic_src && usb_mic_src->audio_track) {
|
|
audio_local_sample_track_in_period(usb_mic_src->audio_track, (len >> 1) / usb_mic_src->input_ch);
|
|
}
|
|
#endif
|
|
#endif/*USB_MIC_SRC_ENABLE*/
|
|
|
|
#if USB_MIC_AEC_EN
|
|
audio_aec_inbuf(data, len);
|
|
#else
|
|
if (usb_mic_hdl->drop_data != 0) {
|
|
usb_mic_hdl-> drop_data--;
|
|
memset(data, 0, len);
|
|
}
|
|
#if TCFG_USB_MIC_ECHO_ENABLE
|
|
if (usb_mic_hdl->p_echo_hdl) {
|
|
run_echo(usb_mic_hdl->p_echo_hdl, data, data, len);
|
|
}
|
|
#endif
|
|
|
|
usb_audio_mic_write(data, len);
|
|
#endif
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
#if USB_MIC_SRC_ENABLE
|
|
static int sw_src_init(u32 in_sr, u32 out_sr)
|
|
{
|
|
usb_mic_src = zalloc(sizeof(usb_mic_sw_src_t));
|
|
ASSERT(usb_mic_src);
|
|
/* usb_mic_src->ops = get_rs16_context(); */
|
|
usb_mic_src->ops = get_rsfast_context();
|
|
g_printf("ops:0x%x\n", usb_mic_src->ops);
|
|
ASSERT(usb_mic_src->ops);
|
|
u32 need_buf = usb_mic_src->ops->need_buf();
|
|
g_printf("runbuf:%d\n", need_buf);
|
|
usb_mic_src->runbuf = malloc(need_buf);
|
|
ASSERT(usb_mic_src->runbuf);
|
|
RS_PARA_STRUCT rs_para_obj;
|
|
rs_para_obj.nch = 1;
|
|
|
|
rs_para_obj.new_insample = in_sr;
|
|
rs_para_obj.new_outsample = out_sr;
|
|
printf("sw src,in = %d,out = %d\n", rs_para_obj.new_insample, rs_para_obj.new_outsample);
|
|
usb_mic_src->ops->open(usb_mic_src->runbuf, &rs_para_obj);
|
|
|
|
#ifdef CONFIG_MEDIA_DEVELOP_ENABLE
|
|
usb_mic_src->input_ch = rs_para_obj.nch;
|
|
usb_mic_src->in_sample_rate = in_sr;
|
|
usb_mic_src->audio_track = audio_local_sample_track_open(usb_mic_src->input_ch, in_sr, 1000);
|
|
#endif
|
|
|
|
usb_mic_src->start = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int sw_src_exit(void)
|
|
{
|
|
if (usb_mic_src) {
|
|
usb_mic_src->start = 0;
|
|
while (usb_mic_src->busy) {
|
|
putchar('w');
|
|
os_time_dly(2);
|
|
}
|
|
|
|
#ifdef CONFIG_MEDIA_DEVELOP_ENABLE
|
|
audio_local_sample_track_close(usb_mic_src->audio_track);
|
|
usb_mic_src->audio_track = NULL;
|
|
#endif
|
|
|
|
local_irq_disable();
|
|
if (usb_mic_src->runbuf) {
|
|
free(usb_mic_src->runbuf);
|
|
usb_mic_src->runbuf = 0;
|
|
}
|
|
free(usb_mic_src);
|
|
usb_mic_src = NULL;
|
|
local_irq_enable();
|
|
printf("sw_src_exit\n");
|
|
}
|
|
printf("sw_src_exit ok\n");
|
|
return 0;
|
|
}
|
|
#endif/*USB_MIC_SRC_ENABLE*/
|
|
|
|
|
|
|
|
#if USB_MIC_AEC_EN
|
|
static int usb_mic_aec_output(s16 *data, u16 len)
|
|
{
|
|
//putchar('k');
|
|
if (usb_mic_hdl == NULL) {
|
|
return len ;
|
|
}
|
|
if (usb_mic_hdl->status == USB_MIC_STOP) {
|
|
return len;
|
|
}
|
|
|
|
int outlen = len;
|
|
s16 *outdat = data;
|
|
/* if (aec_hdl->dump_packet) { */
|
|
/* aec_hdl->dump_packet--; */
|
|
/* //memset(outdat, 0, outlen); */
|
|
/* } */
|
|
u16 wlen = usb_audio_mic_write(outdat, outlen);
|
|
return len;
|
|
|
|
}
|
|
#endif
|
|
|
|
int uac_mic_vol_switch(int vol)
|
|
{
|
|
return vol * 14 / 100;
|
|
}
|
|
|
|
int usb_audio_mic_open(void *_info)
|
|
{
|
|
if (usb_mic_hdl) {
|
|
return 0;
|
|
}
|
|
usb_mic_hdl = zalloc(sizeof(*usb_mic_hdl));
|
|
if (!usb_mic_hdl) {
|
|
return -EFAULT;
|
|
}
|
|
usb_mic_hdl->status = USB_MIC_STOP;
|
|
|
|
usb_mic_hdl->output_buf = zalloc(PCM_ENC2USB_OUTBUF_LEN);
|
|
if (!usb_mic_hdl->output_buf) {
|
|
printf("usb_mic_hdl->output_buf NULL\n");
|
|
|
|
if (usb_mic_hdl) {
|
|
free(usb_mic_hdl);
|
|
usb_mic_hdl = NULL;
|
|
}
|
|
return -EFAULT;
|
|
}
|
|
|
|
u32 sample_rate = (u32)_info & 0xFFFFFF;
|
|
usb_mic_hdl->rec_tx_channels = (u32)_info >> 24;
|
|
usb_mic_hdl->source = ENCODE_SOURCE_MIC;
|
|
printf("usb mic sr:%d ch:%d\n", sample_rate, usb_mic_hdl->rec_tx_channels);
|
|
|
|
|
|
usb_mic_hdl->drop_data = 2; //用来丢掉前几帧数据
|
|
u32 out_sample_rate = sample_rate;
|
|
#if USB_MIC_AEC_EN
|
|
sample_rate = 16000;
|
|
printf("usb mic sr[aec]:%d\n", sample_rate);
|
|
//audio_aec_init(sample_rate);
|
|
audio_aec_open(sample_rate, ANS_EN, usb_mic_aec_output);
|
|
#endif
|
|
|
|
#if USB_MIC_SRC_ENABLE
|
|
sw_src_init(sample_rate, out_sample_rate);
|
|
#endif /*USB_MIC_SRC_ENABLE*/
|
|
|
|
|
|
cbuf_init(&usb_mic_hdl->output_cbuf, usb_mic_hdl->output_buf, PCM_ENC2USB_OUTBUF_LEN);
|
|
|
|
#if TCFG_MIC_EFFECT_ENABLE
|
|
app_var.usb_mic_gain = mic_effect_get_micgain();
|
|
#else
|
|
app_var.usb_mic_gain = uac_mic_vol_switch(uac_get_mic_vol(0));
|
|
#endif//TCFG_MIC_EFFECT_ENABLE
|
|
|
|
#if (TCFG_USB_MIC_DATA_FROM_MICEFFECT)
|
|
mic_effect_to_usbmic_onoff(1);
|
|
#else
|
|
#if 0
|
|
audio_adc_mic_open(&usb_mic_hdl->mic_ch, AUDIO_ADC_MIC_CH, &adc_hdl);
|
|
audio_adc_mic_set_sample_rate(&usb_mic_hdl->mic_ch, sample_rate);
|
|
audio_adc_mic_set_gain(&usb_mic_hdl->mic_ch, app_var.usb_mic_gain);
|
|
audio_adc_mic_set_buffs(&usb_mic_hdl->mic_ch, usb_mic_hdl->adc_buf, USB_MIC_IRQ_POINTS * 2, USB_MIC_BUF_NUM);
|
|
usb_mic_hdl->adc_output.handler = adc_output_to_cbuf;
|
|
audio_adc_add_output_handler(&adc_hdl, &usb_mic_hdl->adc_output);
|
|
audio_adc_mic_start(&usb_mic_hdl->mic_ch);
|
|
#else
|
|
audio_mic_open(&usb_mic_hdl->mic_ch, sample_rate, app_var.usb_mic_gain);
|
|
usb_mic_hdl->adc_output.handler = adc_output_to_cbuf;
|
|
audio_mic_add_output(&usb_mic_hdl->adc_output);
|
|
audio_mic_start(&usb_mic_hdl->mic_ch);
|
|
#endif
|
|
#if TCFG_USB_MIC_ECHO_ENABLE
|
|
usb_mic_hdl->p_echo_hdl = open_echo(&usbmic_echo_parm_default, &usbmic_echo_fix_parm_default);
|
|
if (usb_mic_hdl->p_echo_hdl) {
|
|
update_echo_gain(usb_mic_hdl->p_echo_hdl, usbmic_echo_fix_parm_default.wetgain, usbmic_echo_fix_parm_default.drygain);
|
|
}
|
|
#endif
|
|
#endif//TCFG_USB_MIC_DATA_FROM_MICEFFECT
|
|
set_uac_mic_tx_handler(NULL, usb_audio_mic_tx_handler);
|
|
|
|
usb_mic_hdl->status = USB_MIC_START;
|
|
/* __this->rec_begin = 0; */
|
|
return 0;
|
|
|
|
return -EFAULT;
|
|
}
|
|
|
|
u32 usb_mic_is_running()
|
|
{
|
|
if (usb_mic_hdl) {
|
|
return SPK_AUDIO_RATE;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
*************************************************************
|
|
*
|
|
* usb mic gain save
|
|
*
|
|
*************************************************************
|
|
*/
|
|
static int usb_mic_gain_save_timer;
|
|
static u8 usb_mic_gain_save_cnt;
|
|
static void usb_audio_mic_gain_save_do(void *priv)
|
|
{
|
|
//printf(" usb_audio_mic_gain_save_do %d\n", usb_mic_gain_save_cnt);
|
|
local_irq_disable();
|
|
if (++usb_mic_gain_save_cnt >= 5) {
|
|
sys_hi_timer_del(usb_mic_gain_save_timer);
|
|
usb_mic_gain_save_timer = 0;
|
|
usb_mic_gain_save_cnt = 0;
|
|
local_irq_enable();
|
|
printf("USB_GAIN_SAVE\n");
|
|
syscfg_write(VM_USB_MIC_GAIN, &app_var.usb_mic_gain, 1);
|
|
return;
|
|
}
|
|
local_irq_enable();
|
|
}
|
|
|
|
static void usb_audio_mic_gain_change(u8 gain)
|
|
{
|
|
local_irq_disable();
|
|
app_var.usb_mic_gain = gain;
|
|
usb_mic_gain_save_cnt = 0;
|
|
if (usb_mic_gain_save_timer == 0) {
|
|
usb_mic_gain_save_timer = sys_hi_timer_add(NULL, usb_audio_mic_gain_save_do, 1000);
|
|
}
|
|
local_irq_enable();
|
|
}
|
|
|
|
int usb_audio_mic_get_gain(void)
|
|
{
|
|
return app_var.usb_mic_gain;
|
|
}
|
|
|
|
void usb_audio_mic_set_gain(int gain)
|
|
{
|
|
if (usb_mic_hdl == NULL) {
|
|
r_printf("usb_mic_hdl NULL gain");
|
|
return;
|
|
}
|
|
gain = uac_mic_vol_switch(gain);
|
|
audio_adc_mic_set_gain(&usb_mic_hdl->mic_ch, gain);
|
|
usb_audio_mic_gain_change(gain);
|
|
}
|
|
int usb_audio_mic_close(void *arg)
|
|
{
|
|
if (usb_mic_hdl == NULL) {
|
|
r_printf("usb_mic_hdl NULL close");
|
|
return 0;
|
|
}
|
|
printf("usb_mic_hdl->status %x\n", usb_mic_hdl->status);
|
|
if (usb_mic_hdl && usb_mic_hdl->status == USB_MIC_START) {
|
|
printf("usb_audio_mic_close in\n");
|
|
usb_mic_hdl->status = USB_MIC_STOP;
|
|
#if USB_MIC_AEC_EN
|
|
audio_aec_close();
|
|
#endif
|
|
|
|
#if (TCFG_USB_MIC_DATA_FROM_MICEFFECT)
|
|
mic_effect_to_usbmic_onoff(0);
|
|
#else
|
|
#if 0
|
|
audio_adc_mic_close(&usb_mic_hdl->mic_ch);
|
|
audio_adc_del_output_handler(&adc_hdl, &usb_mic_hdl->adc_output);
|
|
#else
|
|
audio_mic_close(&usb_mic_hdl->mic_ch, &usb_mic_hdl->adc_output);
|
|
#endif
|
|
#if TCFG_USB_MIC_ECHO_ENABLE
|
|
if (usb_mic_hdl->p_echo_hdl) {
|
|
close_echo(usb_mic_hdl->p_echo_hdl);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
#if USB_MIC_SRC_ENABLE
|
|
sw_src_exit();
|
|
#endif /*USB_MIC_SRC_ENABLE*/
|
|
cbuf_clear(&usb_mic_hdl->output_cbuf);
|
|
if (usb_mic_hdl) {
|
|
|
|
if (usb_mic_hdl->output_buf) {
|
|
free(usb_mic_hdl->output_buf);
|
|
usb_mic_hdl->output_buf = NULL;
|
|
}
|
|
free(usb_mic_hdl);
|
|
usb_mic_hdl = NULL;
|
|
}
|
|
}
|
|
printf("usb_audio_mic_close out\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int usb_mic_stream_sample_rate(void)
|
|
{
|
|
#if USB_MIC_SRC_ENABLE
|
|
#ifdef CONFIG_MEDIA_DEVELOP_ENABLE
|
|
if (usb_mic_src && usb_mic_src->audio_track) {
|
|
int sr = audio_local_sample_track_rate(usb_mic_src->audio_track);
|
|
if ((sr < (usb_mic_src->in_sample_rate + 500)) && (sr > (usb_mic_src->in_sample_rate - 500))) {
|
|
return sr;
|
|
}
|
|
/* printf("uac audio_track reset \n"); */
|
|
local_irq_disable();
|
|
audio_local_sample_track_close(usb_mic_src->audio_track);
|
|
usb_mic_src->audio_track = audio_local_sample_track_open(SPK_CHANNEL, usb_mic_src->in_sample_rate, 1000);
|
|
local_irq_enable();
|
|
return usb_mic_src->in_sample_rate;
|
|
}
|
|
#endif
|
|
#endif /*USB_MIC_SRC_ENABLE*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 usb_mic_stream_size()
|
|
{
|
|
if (!usb_mic_hdl) {
|
|
return 0;
|
|
}
|
|
if (usb_mic_hdl->status == USB_MIC_START) {
|
|
if (usb_mic_hdl) {
|
|
return cbuf_get_data_size(&usb_mic_hdl->output_cbuf);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 usb_mic_stream_length()
|
|
{
|
|
return PCM_ENC2USB_OUTBUF_LEN;
|
|
}
|
|
|
|
int usb_output_sample_rate()
|
|
{
|
|
int sample_rate = usb_mic_stream_sample_rate();
|
|
int buf_size = usb_mic_stream_size();
|
|
|
|
if (buf_size >= (usb_mic_stream_length() * 3 / 4)) {
|
|
sample_rate += (sample_rate * 5 / 10000);
|
|
/* putchar('+'); */
|
|
}
|
|
if (buf_size <= (usb_mic_stream_length() / 4)) {
|
|
sample_rate -= (sample_rate * 5 / 10000);
|
|
/* putchar('-'); */
|
|
}
|
|
return sample_rate;
|
|
}
|
|
|
|
#endif /* TCFG_APP_PC_EN */
|