int analyze (char *filename) {
float resnum_freq;
float resnum_amp;
float resnum_env;
int i, d;
float resnum;
current_sample_array = audio_decode(current_sample_array, filename); // Decode audio track
resnum_env = envelope_sort((int16_t*)current_sample_array); // Attack sort // TODO better implementation of final sort
resnum_amp = amp_sort((int16_t*)current_sample_array); // Amplitude sort
resnum_freq = freq_sort((int16_t*)current_sample_array); // Freq sort
resnum = resnum_amp + resnum_freq + resnum_env;
if(debug)
printf("FINAL RESULT: %f\n", resnum);
if(resnum == 0) {
if(debug)
printf("Can't conclude...\n");
return 2;
}
else if(resnum > 0) {
if(debug)
printf("Loud\n");
return 0;
}
else if(resnum < 0) {
if(debug)
printf("Calm\n");
return 1;
}
}
/* This callback is called each time the sndstream driver needs
some more data. It will tell us how much it needs in bytes. */
static void* xing_callback(snd_stream_hnd_t hnd, int size, int * actual) {
static int frames = 0;
IN_OUT x;
/* Check for file not started or file finished */
if (mp3_fd == 0)
return NULL;
/* Dump the last PCM packet */
pcm_empty(pcm_discard);
/* Loop decoding until we have a full buffer */
while (pcm_count < size) {
/* Pull in some more data (and check for EOF) */
if (bs_fill() < 0 || bs_count < frame_bytes) {
printf("Decode completed\r\n");
goto errorout;
}
/* Decode a frame */
x = audio_decode(&mpeg, bs_ptr, (short*)pcm_ptr);
if (x.in_bytes <= 0) {
printf("Bad sync in MPEG file\r\n");
goto errorout;
}
bs_ptr += x.in_bytes; bs_count -= x.in_bytes;
pcm_ptr += x.out_bytes; pcm_count += x.out_bytes;
frames++;
/*if (!(frames % 64)) {
printf("Decoded %d frames \r", frames);
}*/
}
pcm_discard = *actual = size;
/* Got it successfully */
return pcm_buffer;
errorout:
fs_close(mp3_fd); mp3_fd = 0;
return NULL;
}
