/* call to check the buffer contents for file reading. move the client
* to right place in the queue at end of file else repeat file if queue
* is not ready yet.
*/
int format_check_file_buffer (source_t *source, client_t *client)
{
refbuf_t *refbuf = client->refbuf;
if (refbuf == NULL)
{
/* client refers to no data, must be from a move */
if (source->client->con)
{
find_client_start (source, client);
return -1;
}
/* source -> file fallback, need a refbuf for data */
refbuf = refbuf_new (PER_CLIENT_REFBUF_SIZE);
client->refbuf = refbuf;
client->pos = refbuf->len;
client->intro_offset = 0;
}
if (client->pos == refbuf->len)
{
if (get_file_data (source->intro_file, client))
{
client->pos = 0;
client->intro_offset += refbuf->len;
}
else
{
if (source->stream_data_tail)
{
/* better find the right place in queue for this client */
client_set_queue (client, NULL);
find_client_start (source, client);
}
else
client->intro_offset = 0; /* replay intro file */
return -1;
}
}
return 0;
}
/* general send routine per listener. The deletion_expected tells us whether
* the last in the queue is about to disappear, so if this client is still
* referring to it after writing then drop the client as it's fallen too far
* behind
*/
static void send_to_listener (source_t *source, client_t *client, int deletion_expected)
{
int bytes;
int loop = 10; /* max number of iterations in one go */
int total_written = 0;
/* new users need somewhere to start from */
if (client->refbuf == NULL)
{
find_client_start (source, client);
if (client->refbuf == NULL)
return;
}
while (1)
{
/* jump out if client connection has died */
if (client->con->error)
break;
/* lets not send too much to one client in one go, but don't
sleep for too long if more data can be sent */
if (total_written > 20000 || loop == 0)
{
source->short_delay = 1;
break;
}
loop--;
bytes = source->format->write_buf_to_client (source->format, client);
if (bytes <= 0)
break; /* can't write any more */
total_written += bytes;
}
/* the refbuf referenced at head (last in queue) may be marked for deletion
* if so, check to see if this client is still referring to it */
if (deletion_expected && client->refbuf == source->stream_data)
{
DEBUG0("Client has fallen too far behind, removing");
client->con->error = 1;
}
}
