嗨,我想從董事會記錄,我已成功記錄4秒。問題是當我嘗試記錄更多時間時,我得到一個錯誤,告訴我沒有足夠的記憶。我的目標是記錄一個5分鐘的文件。到現在爲止,我已經創建了一個名爲snIn [256]的緩衝區,其中是樣本。我把它發送到[16K * 4sec]的大緩衝區,當它已滿時,我創建wav文件。如何填寫wavfile的「數據字段」
#include "SAI_InOut.hpp"
#include "F746_GUI.hpp"
#include "Delay.hpp"
#include "WaveformDisplay.hpp"
#include "SDFileSystem.h"
#include "wavfile.h"
using namespace Mikami;
#define RES_STR_SIZE 0x20
#define WAVFILE_SAMPLES_PER_SECOND 16000
#define REC_TIME 4
//Create an SDFileSystem object
SDFileSystem sd("sd");
bool flag = 1;
int count = 0;
char *res_buf;
int rp = 0;
const int NUM_SAMPLES = WAVFILE_SAMPLES_PER_SECOND * REC_TIME;
Array<int16_t> my_buffer(NUM_SAMPLES);
int j = 0;
static const char *target_filename = "/sd/rectest.wav";
const int SEG_SIZE = 256;
int sent_array = 0;
int rec(const char *filename, Array<int16_t> my_buffer)
{
j = 0;
flag = 0;
sent_array = 0;
WavFileResult result;
wavfile_info_t info;
wavfile_data_t data;
WAVFILE_INFO_AUDIO_FORMAT(&info) = 1;
WAVFILE_INFO_NUM_CHANNELS(&info) = 1;
WAVFILE_INFO_SAMPLE_RATE(&info) = WAVFILE_SAMPLES_PER_SECOND;
WAVFILE_INFO_BITS_PER_SAMPLE(&info) = 16;
WAVFILE_INFO_BYTE_RATE(&info) = WAVFILE_INFO_NUM_CHANNELS(&info) * WAVFILE_INFO_SAMPLE_RATE(&info) * (WAVFILE_INFO_BITS_PER_SAMPLE(&info)/8);
WAVFILE_INFO_BLOCK_ALIGN(&info) = 2;
WAVFILE *wf = wavfile_open(filename, WavFileModeWrite, &result);
if (result != WavFileResultOK) {
wavfile_result_string(result, res_buf, RES_STR_SIZE);
printf("%s", res_buf);
return result;
} else printf ("Open file success \r\n");
rp = 0;
WAVFILE_DATA_NUM_CHANNELS(&data) = 1;
result = wavfile_write_info(wf, &info);
if (result != WavFileResultOK) {
wavfile_result_string(result, res_buf, RES_STR_SIZE);
printf("%s", res_buf);
return result; } else printf ("Write info success \r\n");
while (rp < NUM_SAMPLES) {
WAVFILE_DATA_CHANNEL_DATA(&data, 0) = my_buffer[rp];
result = wavfile_write_data(wf, &data);
rp += 1;
}
if (result != WavFileResultOK) {
wavfile_result_string(result, res_buf, RES_STR_SIZE);
printf("%s", res_buf);
return result; } else printf ("Write Data file success \r\n");
result = wavfile_close(wf);
if (result != WavFileResultOK) {
wavfile_result_string(result, res_buf , RES_STR_SIZE);
printf("%s", res_buf);
return result; } else printf ("Close file success \r\n");
//UnMount the filesystem
sd.unmount();
printf("Success rec !\r\n");
return 0;
}
int main()
{
//Mount the filesystem
sd.mount();
const float MAX_DELAY = 0.5f; // 最大遅延,単位:秒
const int FS = I2S_AUDIOFREQ_16K; // 標本化周波數: 16 kHz
const uint32_t MAX_ARRAY_SIZE = (uint32_t)(MAX_DELAY*FS);
SaiIO mySai(SaiIO::BOTH, 256, FS, INPUT_DEVICE_DIGITAL_MICROPHONE_2);
Label myLabel(185, 10, "Delay System", Label::CENTER, Font16);
// ButtonGroup: "ON", "OFF"
const uint16_t BG_LEFT = 370;
const uint16_t BG_WIDTH = 100;
const uint16_t BG_HEIGHT = 45;
ButtonGroup onOff(BG_LEFT, 40, BG_WIDTH/2, BG_HEIGHT,
2, (string[]){"ON", "OFF"}, 0, 0, 2, 1);
const uint16_t SB_LEFT = BG_LEFT - 320;
const uint16_t SB_WIDTH = 270;
const uint16_t SB_Y0 = 240;
char str[20];
sprintf(str, " %3.1f [s]", MAX_DELAY);
SeekBar barDelay(SB_LEFT, SB_Y0, SB_WIDTH,
0, MAX_ARRAY_SIZE, 0, "0", "", str);
NumericLabel<float> labelDelay(SB_LEFT+SB_WIDTH/2, SB_Y0-40, "DELEY: %4.2f", 0, Label::CENTER);
DelaySystem delaySystem(MAX_ARRAY_SIZE);
WaveformDisplay displayIn(*GuiBase::GetLcdPtr(), SB_LEFT+7, 70, 256, 9,LCD_COLOR_WHITE, LCD_COLOR_CYAN,GuiBase::ENUM_BACK);
Label inLabel(SB_LEFT-30, 65, "IN");
WaveformDisplay displayOut(*GuiBase::GetLcdPtr(), SB_LEFT+7, 130, 256, 9,LCD_COLOR_WHITE, LCD_COLOR_CYAN,GuiBase::ENUM_BACK);
Label outLabel(SB_LEFT-30, 125, "OUT");
int runStop = 1;
Array<int16_t> snIn(mySai.GetLength());
Array<int16_t> snOut(mySai.GetLength());
mySai.RecordIn();
mySai.PlayOut();
mySai.PauseOut();
while (true)
{
// On/OFF
int num;
if (onOff.GetTouchedNumber(num))
if (runStop != num)
{
if (num == 0) mySai.ResumeOut();
else mySai.PauseOut();
runStop = num;
}
if (mySai.IsCompleted())
{
for (int n=0; n<mySai.GetLength() ; n++)
{
int16_t xL, xR;
mySai.Input(xL,xR);
int16_t xn = xL + xR;
snIn[n] = xn;
my_buffer[j] = xn;
j++;
if (j == NUM_SAMPLES && flag == 1) {
rec (target_filename , my_buffer); }
int16_t yn = delaySystem.Execute(xn);
mySai.Output(yn, yn);
snOut[n] = yn;
}
mySai.Reset();
displayIn.Execute(snIn);
}
}
}
我連連想過一個可能的解決方案,以直接填寫與SnIn系[256]緩衝液(而不是使用my_buffer)的wavefile的「數據區」,並在端部關閉wavfile。請讓我知道你怎麼想的是和其他解決方案
所張貼的代碼不編譯和看起來更像C++比C推薦,至少,發佈所包含的頭文件,其中板,其中OS等 – user3629249
這裏的庫的https://developer.mbed .org/users/shintamainjp/code/wavfile /#c853ba46d0b9 我正在使用stm32f746,mbed與keil ide – gab55
嗯...也許嘗試寫較小的數據包(因爲您可以處理4秒,也許嘗試兩秒包,所以你可以緩衝一個,而另一個寫道)?我非常肯定,這在有限的記憶中運作良好;例如,我相信這是_Tales of Phantasia_通過不斷從ROM中加載微小的片段到聲音處理器的32 kB RAM來設法讓SNES播放完全有聲的開場曲。 (它也有一個自定義的聲音驅動程序,雖然,設法有效地加倍聲音RAM,但我離題...) –