46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/// Testing the MP3ParserEncoder: the mp3 data must start with a sync word
|
|
|
|
#include <assert.h>
|
|
|
|
#include "AudioTools.h"
|
|
#include "AudioTools/AudioCodecs/MP3Parser.h"
|
|
#include "AudioTools/AudioLibs/Desktop/File.h"
|
|
|
|
MP3ParserEncoder enc; // mp3 packaging
|
|
MetaDataFilterEncoder filter(enc);
|
|
CallbackStream cb;
|
|
EncodedAudioOutput out_stream(&cb, &filter);
|
|
File file;
|
|
StreamCopy copier(out_stream, file);
|
|
|
|
void setup() {
|
|
Serial.begin(115200);
|
|
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
|
|
|
|
file = SD.open("/home/pschatzmann/Music/test.mp3", FILE_READ);
|
|
out_stream.begin();
|
|
|
|
auto write_cb = [](const uint8_t* data, size_t size) {
|
|
// Ensure each emitted chunk starts with an MP3 sync word (0xFFE?)
|
|
if (size >= 2) {
|
|
assert(data[0] == 0xFF && (data[1] & 0xE0) == 0xE0);
|
|
}
|
|
char msg[120];
|
|
snprintf(msg, 120,
|
|
"write: %d, sample_rate: %d, samples: %d, duration: %u us",
|
|
(int)size, (int)enc.audioInfo().sample_rate, enc.samplesPerFrame(),
|
|
(unsigned)enc.frameDurationUs());
|
|
Serial.println(msg);
|
|
return size;
|
|
};
|
|
cb.setWriteCallback(write_cb);
|
|
cb.begin();
|
|
}
|
|
|
|
void loop() {
|
|
if (!copier.copy()) {
|
|
out_stream.end();
|
|
exit(0);
|
|
}
|
|
}
|