/** 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;
}
/** 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);
}
/** 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;
int size_to_copy;
do {
if(mms->asf_header_read_size < mms->asf_header_size) {
/* Read from ASF header buffer */
size_to_copy= FFMIN(size,
mms->asf_header_size - mms->asf_header_read_size);
memcpy(buf, mms->asf_header + mms->asf_header_read_size, size_to_copy);
mms->asf_header_read_size += size_to_copy;
result += size_to_copy;
dprintf(NULL, "Copied %d bytes from stored header. left: %d\n",
size_to_copy, mms->asf_header_size - mms->asf_header_read_size);
if (mms->asf_header_size == mms->asf_header_read_size) {
av_freep(&mms->asf_header);
}
} 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 = read_data(mms, buf, size);
} else {
/* Read from network */
int err = mms_safe_send_recv(mms, 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_IO;
} else {
// copy the data to the packet buffer.
result = read_data(mms, buf, size);
if (result == 0) {
dprintf(NULL, "read asf media paket size is zero!\n");
break;
}
}
} else {
dprintf(NULL, "read packet error!\n");
break;
}
}
} while(!result); // only return one packet.
return result;
}
/** Read at most one media packet (or a whole header). */
static int read_mms_packet(MMSContext *mms, uint8_t *buf, int buf_size)
{
int result = 0;
int size_to_copy;
do {
if(mms->asf_header_read_size < mms->asf_header_size && !mms->is_playing) {
/* Read from ASF header buffer */
size_to_copy= FFMIN(buf_size,
mms->asf_header_size - mms->asf_header_read_size);
memcpy(buf, mms->asf_header + mms->asf_header_read_size, size_to_copy);
mms->asf_header_read_size += size_to_copy;
result += size_to_copy;
dprintf(NULL, "Copied %d bytes from stored header. left: %d\n",
size_to_copy, mms->asf_header_size - mms->asf_header_read_size);
if (mms->asf_header_size == mms->asf_header_read_size) {
av_freep(&mms->asf_header);
mms->is_playing = 1;
}
} 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 = read_data(mms, buf, buf_size);
} else {
/* Read from network */
int err = mms_safe_send_recv(mms, NULL, SC_PKT_ASF_MEDIA);
if (err == 0) {
if(mms->remaining_in_len>mms->asf_packet_len) {
dprintf(NULL, "Incoming packet"
"larger than the asf packet size stated (%d>%d)\n",
mms->remaining_in_len, mms->asf_packet_len);
result= AVERROR_IO;
} else {
// copy the data to the packet buffer.
result = read_data(mms, buf, buf_size);
if (result == 0) {
dprintf(NULL, "read asf media paket size is zero!\n");
break;
}
}
} else {
dprintf(NULL, "read packet error!\n");
break;
}
}
} while(!result); // only return one packet.
return result;
}
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 mms_open(URLContext *h, const char *uri, int flags)
{
MMSContext *mms;
int port, err;
char tcpname[256];
h->is_streamed = 1;
mms = h->priv_data = av_mallocz(sizeof(MMSContext));
if (!h->priv_data)
return AVERROR(ENOMEM);
// only for MMS over TCP, so set proto = NULL
av_url_split(NULL, 0, NULL, 0,
mms->host, sizeof(mms->host), &port, mms->path,
sizeof(mms->path), uri);
if(port<0)
port = 1755; // defaut mms protocol port
// establish tcp connection.
ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, mms->host, port, NULL);
err = url_open(&mms->mms_hd, tcpname, URL_RDWR);
if (err)
goto fail;
mms->packet_id = 3; // default, initial value.
mms->header_packet_id = 2; // default, initial value.
err = mms_safe_send_recv(mms, send_startup_packet, SC_PKT_CLIENT_ACCEPTED);
if (err)
goto fail;
err = mms_safe_send_recv(mms, send_time_test_data, SC_PKT_TIMING_TEST_REPLY);
if (err)
goto fail;
err = mms_safe_send_recv(mms, send_protocol_select, SC_PKT_PROTOCOL_ACCEPTED);
if (err)
goto fail;
err = mms_safe_send_recv(mms, send_media_file_request, SC_PKT_MEDIA_FILE_DETAILS);
if (err)
goto fail;
err = mms_safe_send_recv(mms, send_media_header_request, SC_PKT_HEADER_REQUEST_ACCEPTED);
if (err)
goto fail;
err = mms_safe_send_recv(mms, NULL, SC_PKT_ASF_HEADER);
if (err)
goto fail;
if((mms->incoming_flags != 0X08) && (mms->incoming_flags != 0X0C))
goto fail;
err = asf_header_parser(mms);
if (err) {
dprintf(NULL, "asf header parsed failed!\n");
goto fail;
}
mms->header_parsed = 1;
if (!mms->asf_packet_len || !mms->stream_num)
goto fail;
dprintf(NULL, "Leaving open (success)\n");
return 0;
fail:
mms_close(h);
dprintf(NULL, "Leaving open (failure: %d)\n", err);
return err;
}
