if (1152 - mp3_buffer_offs >= length_mp3) {
mix_samples(buffer, mp3_mix_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);
if (1152 - mp3_buffer_offs >= length_mp3) {
mix_samples(buffer, mp3_mix_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);