void generateFile(wchar_t const* filename, size_t n)
{
int const chunk = 1152;
PcmGenerator src(chunk);
OutFile mp3_stream( filename );
if (!mp3_stream.isOpen()) return;
Lame lame;
if (!lame.isOpen()) return;
OutBuffer mp3_stream_buffer;
int rc = 0;
lame.setInSamplerate(44100);
lame.setOutSamplerate(44100);
lame.setNumChannels(2);
while (n > 0) {
int const m = n < chunk ? n : chunk;
if ( n < chunk ) n = 0; else n -= chunk;
rc = lame.encode(src.ch0(), src.ch1(), m, mp3_stream_buffer.current(), mp3_stream_buffer.unused());
wprintf(L"rc=%d %d %d\n",rc,mp3_stream_buffer.used(),mp3_stream_buffer.unused());
if (rc < 0) return;
mp3_stream_buffer.advance( rc );
src.advance(m);
}
rc = lame.flush(mp3_stream_buffer.current(), mp3_stream_buffer.unused());
wprintf(L"flush rc=%d\n",rc);
if (rc < 0) return;
mp3_stream_buffer.advance( rc );
int lametag_size = lame.getLameTag(0,0);
wprintf(L"lametag_size=%d\n",lametag_size);
rc = lame.getLameTag(mp3_stream_buffer.begin(), lametag_size);
wprintf(L"rc=%d\n",rc);
if (rc < 0) return;
mp3_stream.write(mp3_stream_buffer.begin(), mp3_stream_buffer.used());
lame.close();
}
int main(int argc, char**argv)
{
int rc=0, bytes_encoded=0, bytes_wrote=0;
const unsigned int pcm_size = 10240;
short int pcm[pcm_size]; // raw pcm
const int mp3buffer_size = 10240;
unsigned char mp3buffer[mp3buffer_size]; // cooked mp3
FILE * fp = NULL; // output file
try {
Lame lame;
// open out file
fp = fopen("out.mp3", "wb");
// encoding loop
for(int i=0;i<10;i++)
{
printf("lame_encode_buffer()...\n");
fill_it_up_with_noise(pcm, pcm_size);
bytes_encoded = lame.encode(pcm, pcm, pcm_size, mp3buffer, mp3buffer_size);
bytes_wrote = fwrite(mp3buffer, 1, bytes_encoded, fp);
if(bytes_wrote!=bytes_encoded)
{
stringstream ss;
ss << "Failed to save chunk to file. bytes_wrote=" << bytes_wrote << endl;
throw app_exception(ss.str().c_str());
}
}
}
catch(app_exception& e)
{
printf("EXCEPTION: %s\n", e.msg());
}
printf("rc = %d\n", rc);
if(fp) {
fflush(fp);
fclose(fp);
}
return 0;
}
