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;
}
static int get_http_header_data(MMSHContext *mmsh)
{
MMSContext *mms = &mmsh->mms;
int res, len;
ChunkType chunk_type;
for (;;) {
len = 0;
res = chunk_type = get_chunk_header(mmsh, &len);
if (res < 0) {
return res;
} else if (chunk_type == CHUNK_TYPE_ASF_HEADER){
// get asf header and stored it
if (!mms->header_parsed) {
if (mms->asf_header) {
if (len != mms->asf_header_size) {
mms->asf_header_size = len;
av_dlog(NULL, "Header len changed from %d to %d\n",
mms->asf_header_size, len);
av_freep(&mms->asf_header);
}
}
mms->asf_header = av_mallocz(len);
if (!mms->asf_header) {
return AVERROR(ENOMEM);
}
mms->asf_header_size = len;
}
if (len > mms->asf_header_size) {
av_log(NULL, AV_LOG_ERROR,
"Asf header packet len = %d exceed the asf header buf size %d\n",
len, mms->asf_header_size);
return AVERROR(EIO);
}
res = url_read_complete(mms->mms_hd, mms->asf_header, len);
if (res != len) {
av_log(NULL, AV_LOG_ERROR,
"Recv asf header data len %d != expected len %d\n", res, len);
return AVERROR(EIO);
}
mms->asf_header_size = len;
if (!mms->header_parsed) {
res = ff_mms_asf_header_parser(mms);
mms->header_parsed = 1;
return res;
}
} else if (chunk_type == CHUNK_TYPE_DATA) {
// read data packet and do padding
return read_data_packet(mmsh, len);
} else {
if (len) {
if (len > sizeof(mms->in_buffer)) {
av_log(NULL, AV_LOG_ERROR,
"Other packet len = %d exceed the in_buffer size %zu\n",
len, sizeof(mms->in_buffer));
return AVERROR(EIO);
}
res = url_read_complete(mms->mms_hd, mms->in_buffer, len);
if (res != len) {
av_log(NULL, AV_LOG_ERROR, "Read other chunk type data failed!\n");
return AVERROR(EIO);
} else {
av_dlog(NULL, "Skip chunk type %d \n", chunk_type);
continue;
}
}
}
}
return 0;
}