/** 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 */
MMSContext *mms = h->priv_data;
int result = 0;
/* Since we read the header at open(), this shouldn't be possible */
assert(mms->header_parsed);
if (!mms->is_playing) {
dprintf(NULL, "mms_read() before play().\n");
clear_stream_buffers(mms);
result = mms_safe_send_recv(mms, send_stream_selection_request, SC_PKT_STREAM_ID_ACCEPTED);
if (result)
return result;
// send media packet request
result = mms_safe_send_recv(mms, send_media_packet_request, SC_PKT_MEDIA_PKT_FOLLOWS);
if (result) {
return result;
}
}
return read_mms_packet(mms, buf, size);
}
static int mms_open(URLContext *h, const char *uri, int flags)
{
MMSTContext *mmst;
MMSContext *mms;
int port, err;
char tcpname[256];
h->is_streamed = 1;
mmst = h->priv_data = av_mallocz(sizeof(MMSTContext));
if (!h->priv_data)
return AVERROR(ENOMEM);
mms = &mmst->mms;
// only for MMS over TCP, so set proto = NULL
av_url_split(NULL, 0, NULL, 0,
mmst->host, sizeof(mmst->host), &port, mmst->path,
sizeof(mmst->path), uri);
if(port < 0)
port = 1755; // defaut mms protocol port
// establish tcp connection.
ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, mmst->host, port, NULL);
err = ffurl_open(&mms->mms_hd, tcpname, AVIO_RDWR);
if (err)
goto fail;
mmst->packet_id = 3; // default, initial value.
mmst->header_packet_id = 2; // default, initial value.
err = mms_safe_send_recv(mmst, send_startup_packet, SC_PKT_CLIENT_ACCEPTED);
if (err)
goto fail;
err = mms_safe_send_recv(mmst, send_time_test_data, SC_PKT_TIMING_TEST_REPLY);
if (err)
goto fail;
err = mms_safe_send_recv(mmst, send_protocol_select, SC_PKT_PROTOCOL_ACCEPTED);
if (err)
goto fail;
err = mms_safe_send_recv(mmst, send_media_file_request, SC_PKT_MEDIA_FILE_DETAILS);
if (err)
goto fail;
err = mms_safe_send_recv(mmst, send_media_header_request, SC_PKT_HEADER_REQUEST_ACCEPTED);
if (err)
goto fail;
err = mms_safe_send_recv(mmst, NULL, SC_PKT_ASF_HEADER);
if (err)
goto fail;
if((mmst->incoming_flags != 0X08) && (mmst->incoming_flags != 0X0C))
{
av_log(NULL, AV_LOG_ERROR,
"The server does not support MMST (try MMSH or RTSP)\n");
err = AVERROR(EINVAL);
goto fail;
}
err = ff_mms_asf_header_parser(mms);
if (err)
{
av_dlog(NULL, "asf header parsed failed!\n");
goto fail;
}
mms->header_parsed = 1;
if (!mms->asf_packet_len || !mms->stream_num)
goto fail;
clear_stream_buffers(mms);
err = mms_safe_send_recv(mmst, send_stream_selection_request, SC_PKT_STREAM_ID_ACCEPTED);
if (err)
goto fail;
// send media packet request
err = mms_safe_send_recv(mmst, send_media_packet_request, SC_PKT_MEDIA_PKT_FOLLOWS);
if (err)
{
goto fail;
}
av_dlog(NULL, "Leaving open (success)\n");
return 0;
fail:
mms_close(h);
av_dlog(NULL, "Leaving open (failure: %d)\n", err);
return err;
}
