/* fast send routine */
static int file_send (client_t *client)
{
int loop = 6, bytes, written = 0;
fh_node *fh = client->shared_data;
worker_t *worker = client->worker;
time_t now;
if (fserve_change_worker (client)) // allow for balancing
return 1;
client->schedule_ms = worker->time_ms;
now = worker->current_time.tv_sec;
/* slowdown if max bandwidth is exceeded, but allow for short-lived connections to avoid
* this, eg admin requests */
if (throttle_sends > 1 && now - client->connection.con_time > 1)
{
client->schedule_ms += 300;
loop = 1;
}
while (loop && written < 30000)
{
loop--;
if (fserve_running == 0 || client->connection.error)
return -1;
if (client->connection.discon_time && now >= client->connection.discon_time)
return -1;
if (format_file_read (client, fh->format, fh->f) < 0)
return -1;
bytes = client->check_buffer (client);
if (bytes < 0)
{
client->schedule_ms += (written ? 120 : 250);
break;
}
written += bytes;
client->schedule_ms += 3;
}
return 0;
}
/* send routine for files sent at a target bitrate, eg fallback files. */
static int throttled_file_send (client_t *client)
{
int bytes;
fh_node *fh = client->shared_data;
time_t now;
worker_t *worker = client->worker;
unsigned long secs;
unsigned int rate = 0;
unsigned int limit = fh->finfo.limit;
if (fserve_running == 0 || client->connection.error)
return -1;
now = worker->current_time.tv_sec;
secs = now - client->timer_start;
client->schedule_ms = worker->time_ms;
if (fh->finfo.fallback)
return fserve_move_listener (client);
if (fserve_change_worker (client)) // allow for balancing
return 1;
if (client->flags & CLIENT_WANTS_FLV) /* increase limit for flv clients as wrapping takes more space */
limit = (unsigned long)(limit * 1.01);
rate = secs ? (client->counter+1400)/secs : limit * 2;
// DEBUG3 ("counter %lld, duration %ld, limit %u", client->counter, secs, rate);
if (rate > limit)
{
if (limit >= 1400)
client->schedule_ms += 1000/(limit/1400);
else
client->schedule_ms += 50; // should not happen but guard against it
rate_add (fh->out_bitrate, 0, worker->time_ms);
global_add_bitrates (global.out_bitrate, 0, worker->time_ms);
if (client->counter > 8192)
return 0; // allow an initial amount without throttling
}
switch (format_file_read (client, fh->format, fh->f))
{
case -1: // DEBUG0 ("loop of file triggered");
client->intro_offset = 0;
client->schedule_ms += client->throttle ? client->throttle : 150;
return 0;
case -2: // DEBUG0 ("major failure on read, better leave");
return -1;
default: //DEBUG1 ("reading from offset %ld", client->intro_offset);
break;
}
bytes = client->check_buffer (client);
if (bytes < 0)
bytes = 0;
//DEBUG3 ("bytes %d, counter %ld, %ld", bytes, client->counter, client->worker->time_ms - (client->timer_start*1000));
rate_add (fh->out_bitrate, bytes, worker->time_ms);
global_add_bitrates (global.out_bitrate, bytes, worker->time_ms);
if (limit > 2800)
client->schedule_ms += (1000/(limit/1400*2));
else
client->schedule_ms += 50;
/* progessive slowdown if max bandwidth is exceeded. */
if (throttle_sends > 1)
client->schedule_ms += 300;
return 0;
}