/**
\brief get the delay between the first and last sample in the buffer
\return delay in seconds
*/
static float get_delay(struct ao *ao)
{
struct priv *p = ao->priv;
int space = check_free_buffer_size(ao);
return (float)(p->buffer_size - space) / (float)ao->bps;
}
/**
\brief find out how many bytes can be written into the audio buffer without
\return free space in bytes, has to return 0 if the buffer is almost full
*/
static int get_space(struct ao *ao)
{
struct priv *p = ao->priv;
int space = check_free_buffer_size(ao);
if (space < p->min_free_space)
return 0;
return (space - p->min_free_space) / ao->sstride;
}
/**
\brief play 'len' bytes of 'data'
\param data pointer to the data to play
\param len size in bytes of the data buffer, gets rounded down to outburst*n
\param flags currently unused
\return number of played bytes
*/
static int play(struct ao *ao, void *data, int len, int flags)
{
struct priv *p = ao->priv;
int space = check_free_buffer_size(ao);
if (space < len)
len = space;
if (!(flags & AOPLAY_FINAL_CHUNK))
len = (len / p->outburst) * p->outburst;
return write_buffer(ao, data, len);
}