/** Read ASF data through the protocol. */
static int mms_read(URLContext *h, uint8_t *buf, int size)
{
/* TODO: see tcp.c:tcp_read() about a possible timeout scheme */
MMSTContext *mmst = h->priv_data;
MMSContext *mms = &mmst->mms;
int result = 0;
do
{
if(mms->asf_header_read_size < mms->asf_header_size)
{
/* Read from ASF header buffer */
result = ff_mms_read_header(mms, buf, size);
}
else if(mms->remaining_in_len)
{
/* Read remaining packet data to buffer.
* the result can not be zero because remaining_in_len is positive.*/
result = ff_mms_read_data(mms, buf, size);
}
else
{
/* Read from network */
int err = mms_safe_send_recv(mmst, NULL, SC_PKT_ASF_MEDIA);
if (err == 0)
{
if(mms->remaining_in_len > mms->asf_packet_len)
{
av_log(NULL, AV_LOG_ERROR,
"Incoming pktlen %d is larger than ASF pktsize %d\n",
mms->remaining_in_len, mms->asf_packet_len);
result = AVERROR(EIO);
}
else
{
// copy the data to the packet buffer.
result = ff_mms_read_data(mms, buf, size);
if (result == 0)
{
av_dlog(NULL, "read asf media paket size is zero!\n");
break;
}
}
}
else
{
av_dlog(NULL, "read packet error!\n");
break;
}
}
}
while(!result); // only return one packet.
return result;
}
static int mmsh_read(URLContext *h, uint8_t *buf, int size)
{
int res = 0;
MMSHContext *mmsh = h->priv_data;
MMSContext *mms = &mmsh->mms;
do {
if (mms->asf_header_read_size < mms->asf_header_size) {
// copy asf header into buffer
res = ff_mms_read_header(mms, buf, size);
} else {
if (!mms->remaining_in_len && (res = handle_chunk_type(mmsh)))
return res;
res = ff_mms_read_data(mms, buf, size);
}
} while (!res);
return res;
}