|   size = (
|   |   ((uint64_t)(context->duration) * (uint64_t)song->sample_rate) /
|   |   ((uint64_t)AV_TIME_BASE)
|   |   ) *
|   |   song->channels *
|   |   song->nb_bytes_per_sample;

                if ((index * song->nb_bytes_per_sample + data_size) > size) {
|   |   |   |   |   size += data_size;
|   |   |   |   |   int8_t *ptr;
|   |   |   |   |   ptr = realloc(beginning, size);
|   |   |   |   |   if(ptr != NULL)
|   |   |   |   |   |   beginning = ptr;
                    song->nSamples += data_size / song->nb_bytes_per_sample;