100 lines
2.1 KiB
Arduino
100 lines
2.1 KiB
Arduino
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// This example tests the update of the file size in the WAV header after recording.
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#include "AudioTools.h"
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#include "AudioTools/Disk/WAVFileInfo.h"
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#include "SD_MMC.h"
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const char* test_file = "/test.wav";
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// record sine data in file
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void record() {
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File file = SD_MMC.open(test_file, FILE_WRITE);
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if (!file) {
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Serial.println("Failed to open file for writing");
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return;
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}
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assert(file.seek(0));
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SineGenerator sine;
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GeneratedSoundStream gen(sine);
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WAVEncoder encoder;
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EncodedAudioStream out(&file, &encoder);
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StreamCopy copy(out, gen);
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// setup objects
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gen.begin();
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sine.setFrequency(440);
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out.begin();
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// copy data
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for (int j = 0; j < 50; j++) {
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copy.copy();
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}
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// save file
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file.close();
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}
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// print file size info
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void printInfo() {
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File file = SD_MMC.open(test_file, FILE_READ);
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if (!file) {
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Serial.println("Failed to open file for reading");
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return;
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}
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WAVFileInfo wav_info;
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WAVAudioInfo info;
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assert(wav_info.getInfo(file, info));
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Serial.print("WAV header file size:");
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Serial.println(info.file_size);
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Serial.print("WAV file size: ");
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Serial.println(file.size());
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Serial.print("WAV header data length:");
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Serial.println(info.data_length);
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file.close();
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}
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// update file size
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void update() {
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// Use read/write mode without truncating the file.
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File file = SD_MMC.open(test_file, "rb+");
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if (!file) {
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Serial.println("Failed to open file for read/write");
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return;
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}
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WAVFileInfo wav_info;
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if (!wav_info.updateSize(file)) {
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Serial.println("Failed to update file size in WAV header");
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} else {
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Serial.println("WAV header updated with correct file size");
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}
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file.close();
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}
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void setup() {
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Serial.begin(115200);
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delay(3000);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
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Serial.println("starting...");
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if (!SD_MMC.begin()) {
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Serial.println("Card Mount Failed");
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return;
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}
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SD_MMC.remove(test_file);
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record();
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Serial.println("Before update:");
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printInfo();
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Serial.println("Update:");
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update();
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Serial.println("After update:");
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printInfo();
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}
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// nothing to do
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void loop() {}
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