mirror of https://git.ffmpeg.org/ffmpeg.git
MMS-over-TCP protocol support. Patch by Zhentan Feng <spyfeng gmail com>.
Originally committed as revision 23301 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Zhentan Feng
Ronald S. Bultje
parent
e34d5db595
commit
a24039861d
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@ -6,6 +6,7 @@ version <next>:
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- WebM support in Matroska demuxer
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- low overhead Ogg muxing
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- MMS-TCP support
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@ -687,6 +687,7 @@ performance on systems without hardware floating point support).
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@item file @tab X
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@item Gopher @tab X
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@item HTTP @tab X
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@item MMS @tab X
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@item pipe @tab X
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@item RTP @tab X
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@item TCP @tab X
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@ -275,6 +275,7 @@ OBJS+= avio.o aviobuf.o
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OBJS-$(CONFIG_FILE_PROTOCOL) += file.o
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OBJS-$(CONFIG_GOPHER_PROTOCOL) += gopher.o
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OBJS-$(CONFIG_HTTP_PROTOCOL) += http.o httpauth.o
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OBJS-$(CONFIG_MMST_PROTOCOL) += mmst.o asf.o
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OBJS-$(CONFIG_PIPE_PROTOCOL) += file.o
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# external or internal rtmp
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@ -219,6 +219,7 @@ void av_register_all(void)
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REGISTER_PROTOCOL (FILE, file);
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REGISTER_PROTOCOL (GOPHER, gopher);
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REGISTER_PROTOCOL (HTTP, http);
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REGISTER_PROTOCOL (MMST, mmst);
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REGISTER_PROTOCOL (PIPE, pipe);
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REGISTER_PROTOCOL (RTMP, rtmp);
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#if CONFIG_LIBRTMP
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@ -22,8 +22,8 @@
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#define AVFORMAT_AVFORMAT_H
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#define LIBAVFORMAT_VERSION_MAJOR 52
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#define LIBAVFORMAT_VERSION_MINOR 64
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#define LIBAVFORMAT_VERSION_MICRO 1
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#define LIBAVFORMAT_VERSION_MINOR 65
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#define LIBAVFORMAT_VERSION_MICRO 0
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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LIBAVFORMAT_VERSION_MINOR, \
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@ -0,0 +1,690 @@
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/*
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* MMS protocol over TCP
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* Copyright (c) 2006,2007 Ryan Martell
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* Copyright (c) 2007 Björn Axelsson
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* Copyright (c) 2010 Zhentan Feng <spyfeng at gmail dot com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "internal.h"
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#include "libavutil/intreadwrite.h"
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#include "libavcodec/bytestream.h"
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#include "network.h"
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#include "asf.h"
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#define LOCAL_ADDRESS 0xc0a80081 // FIXME get and use correct local ip address.
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#define LOCAL_PORT 1037 // as above.
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/** Client to server packet types. */
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typedef enum {
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CS_PKT_INITIAL = 0x01,
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CS_PKT_PROTOCOL_SELECT = 0x02,
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CS_PKT_MEDIA_FILE_REQUEST = 0x05,
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CS_PKT_START_FROM_PKT_ID = 0x07,
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CS_PKT_STREAM_PAUSE = 0x09,
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CS_PKT_STREAM_CLOSE = 0x0d,
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CS_PKT_MEDIA_HEADER_REQUEST = 0x15,
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CS_PKT_TIMING_DATA_REQUEST = 0x18,
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CS_PKT_USER_PASSWORD = 0x1a,
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CS_PKT_KEEPALIVE = 0x1b,
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CS_PKT_STREAM_ID_REQUEST = 0x33,
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} MMSCSPacketType;
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/** Server to client packet types. */
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typedef enum {
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/** Control packets. */
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/*@{*/
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SC_PKT_CLIENT_ACCEPTED = 0x01,
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SC_PKT_PROTOCOL_ACCEPTED = 0x02,
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SC_PKT_PROTOCOL_FAILED = 0x03,
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SC_PKT_MEDIA_PKT_FOLLOWS = 0x05,
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SC_PKT_MEDIA_FILE_DETAILS = 0x06,
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SC_PKT_HEADER_REQUEST_ACCEPTED = 0x11,
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SC_PKT_TIMING_TEST_REPLY = 0x15,
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SC_PKT_PASSWORD_REQUIRED = 0x1a,
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SC_PKT_KEEPALIVE = 0x1b,
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SC_PKT_STREAM_STOPPED = 0x1e,
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SC_PKT_STREAM_CHANGING = 0x20,
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SC_PKT_STREAM_ID_ACCEPTED = 0x21,
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/*@}*/
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/** Pseudo packets. */
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/*@{*/
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SC_PKT_CANCEL = -1,
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SC_PKT_NO_DATA = -2,
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/*@}*/
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/** Data packets. */
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/*@{*/
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SC_PKT_ASF_HEADER = 0x010000,// make it bigger than 0xFF in case of
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SC_PKT_ASF_MEDIA = 0x010001,// receiving false data packets.
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/*@}*/
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} MMSSCPacketType;
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typedef struct {
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int id;
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}MMSStream;
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typedef struct {
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int outgoing_packet_seq; ///< Outgoing packet sequence number.
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char path[256]; ///< Path of the resource being asked for.
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char host[128]; ///< Host of the resources.
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URLContext *mms_hd; ///< TCP connection handle
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MMSStream streams[MAX_STREAMS];
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/** Buffer for outgoing packets. */
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/*@{*/
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uint8_t *write_out_ptr; ///< Pointer for writting the buffer.
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uint8_t out_buffer[512]; ///< Buffer for outgoing packet.
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/*@}*/
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/** Buffer for incoming packets. */
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/*@{*/
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uint8_t in_buffer[8192]; ///< Buffer for incoming packets.
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uint8_t *read_in_ptr; ///< Pointer for reading from incoming buffer.
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int remaining_in_len; ///< Reading length from incoming buffer.
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/*@}*/
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int incoming_packet_seq; ///< Incoming packet sequence number.
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int incoming_flags; ///< Incoming packet flags.
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int packet_id; ///< Identifier for packets in the current stream.
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unsigned int header_packet_id; ///< default is 2.
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/** Internal handling of the ASF header */
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/*@{*/
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uint8_t *asf_header; ///< Stored ASF header.
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int asf_header_size; ///< Size of stored ASF header.
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int header_parsed; ///< The header has been received and parsed.
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int asf_packet_len;
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/*@}*/
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int stream_num; ///< stream numbers.
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int is_playing;
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} MMSContext;
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/** Create MMST command packet header */
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static void start_command_packet(MMSContext *mms, MMSCSPacketType packet_type)
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{
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mms->write_out_ptr = mms->out_buffer;
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bytestream_put_le32(&mms->write_out_ptr, 1); // start sequence
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bytestream_put_le32(&mms->write_out_ptr, 0xb00bface);
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bytestream_put_le32(&mms->write_out_ptr, 0); // Length starts from after the protocol type bytes
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bytestream_put_le32(&mms->write_out_ptr, MKTAG('M','M','S',' '));
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bytestream_put_le32(&mms->write_out_ptr, 0);
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bytestream_put_le32(&mms->write_out_ptr, mms->outgoing_packet_seq++);
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bytestream_put_le64(&mms->write_out_ptr, 0); // timestamp
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bytestream_put_le32(&mms->write_out_ptr, 0);
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bytestream_put_le16(&mms->write_out_ptr, packet_type);
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bytestream_put_le16(&mms->write_out_ptr, 3); // direction to server
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}
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/** Add prefixes to MMST command packet. */
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static void insert_command_prefixes(MMSContext *mms,
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uint32_t prefix1, uint32_t prefix2)
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{
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bytestream_put_le32(&mms->write_out_ptr, prefix1); // first prefix
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bytestream_put_le32(&mms->write_out_ptr, prefix2); // second prefix
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}
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/** Send a prepared MMST command packet. */
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static int send_command_packet(MMSContext *mms)
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{
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int exact_length= mms->write_out_ptr - mms->out_buffer;
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int first_length= exact_length - 16;
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int len8= first_length/8;
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int write_result;
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// update packet length fields.
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AV_WL32(mms->out_buffer + 8, first_length);
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AV_WL32(mms->out_buffer + 16, len8);
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AV_WL32(mms->out_buffer + 32, len8-2);
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// write it out.
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write_result= url_write(mms->mms_hd, mms->out_buffer, exact_length);
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if(write_result != exact_length) {
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dprintf(NULL, "url_write returned: %d != %d\n",
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write_result, exact_length);
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return AVERROR_IO;
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}
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return 0;
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}
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static void mms_put_utf16(MMSContext *mms, uint8_t *src)
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{
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ByteIOContext bic;
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int size = mms->write_out_ptr - mms->out_buffer;
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int len;
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init_put_byte(&bic, mms->write_out_ptr,
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sizeof(mms->out_buffer) - size, 1, NULL, NULL, NULL, NULL);
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len = ff_put_str16_nolen(&bic, src);
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mms->write_out_ptr += len;
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}
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static int send_protocol_select(MMSContext *mms)
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{
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char data_string[256];
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start_command_packet(mms, CS_PKT_PROTOCOL_SELECT);
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insert_command_prefixes(mms, 0, 0xffffffff);
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bytestream_put_le32(&mms->write_out_ptr, 0); // maxFunnelBytes
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bytestream_put_le32(&mms->write_out_ptr, 0x00989680); // maxbitRate
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bytestream_put_le32(&mms->write_out_ptr, 2); // funnelMode
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snprintf(data_string, sizeof(data_string), "\\\\%d.%d.%d.%d\\%s\\%d",
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(LOCAL_ADDRESS>>24)&0xff,
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(LOCAL_ADDRESS>>16)&0xff,
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(LOCAL_ADDRESS>>8)&0xff,
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LOCAL_ADDRESS&0xff,
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"TCP", // or UDP
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LOCAL_PORT);
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mms_put_utf16(mms, data_string);
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return send_command_packet(mms);
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}
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static int send_media_file_request(MMSContext *mms)
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{
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start_command_packet(mms, CS_PKT_MEDIA_FILE_REQUEST);
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insert_command_prefixes(mms, 1, 0xffffffff);
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bytestream_put_le32(&mms->write_out_ptr, 0);
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bytestream_put_le32(&mms->write_out_ptr, 0);
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mms_put_utf16(mms, mms->path + 1); // +1 for skip "/"
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return send_command_packet(mms);
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}
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static void handle_packet_stream_changing_type(MMSContext *mms)
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{
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dprintf(NULL, "Stream changing!\n");
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// 40 is the packet header size, 7 is the prefix size.
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mms->header_packet_id= AV_RL32(mms->in_buffer + 40 + 7);
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dprintf(NULL, "Changed header prefix to 0x%x", mms->header_packet_id);
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}
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static int send_keepalive_packet(MMSContext *mms)
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{
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// respond to a keepalive with a keepalive...
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start_command_packet(mms, CS_PKT_KEEPALIVE);
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insert_command_prefixes(mms, 1, 0x100FFFF);
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return send_command_packet(mms);
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}
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/** Pad media packets smaller than max_packet_size and/or adjust read position
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* after a seek. */
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static void pad_media_packet(MMSContext *mms)
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{
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if(mms->remaining_in_len<mms->asf_packet_len) {
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int padding_size = mms->asf_packet_len - mms->remaining_in_len;
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memset(mms->in_buffer + mms->remaining_in_len, 0, padding_size);
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mms->remaining_in_len += padding_size;
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}
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}
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/** Read incoming MMST media, header or command packet. */
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static MMSSCPacketType get_tcp_server_response(MMSContext *mms)
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{
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int read_result;
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MMSSCPacketType packet_type= -1;
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for(;;) {
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if((read_result= url_read_complete(mms->mms_hd, mms->in_buffer, 8))==8) {
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// handle command packet.
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if(AV_RL32(mms->in_buffer + 4)==0xb00bface) {
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mms->incoming_flags= mms->in_buffer[3];
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read_result= url_read_complete(mms->mms_hd, mms->in_buffer+8, 4);
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if(read_result == 4) {
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int length_remaining= AV_RL32(mms->in_buffer+8) + 4;
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dprintf(NULL, "Length remaining is %d\n", length_remaining);
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// read the rest of the packet.
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if (length_remaining < 0
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|| length_remaining > sizeof(mms->in_buffer) - 12) {
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dprintf("Incoming message len %d exceeds buffer len %d\n",
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length_remaining, sizeof(mms->in_buffer) - 12);
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return -1;
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}
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read_result = url_read_complete(mms->mms_hd, mms->in_buffer + 12,
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length_remaining) ;
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if (read_result == length_remaining) {
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packet_type= AV_RL16(mms->in_buffer+36);
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} else {
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dprintf(NULL, "read for packet type failed%d!\n", read_result);
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return -1;
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}
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} else {
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dprintf(NULL, "read for length remaining failed%d!\n", read_result);
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return -1;
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}
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} else {
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int length_remaining;
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int packet_id_type;
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int tmp;
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assert(mms->remaining_in_len==0);
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// note we cache the first 8 bytes,
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// then fill up the buffer with the others
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tmp = AV_RL16(mms->in_buffer + 6);
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length_remaining = (tmp - 8) & 0xffff;
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mms->incoming_packet_seq = AV_RL32(mms->in_buffer);
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packet_id_type = mms->in_buffer[4];
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mms->incoming_flags = mms->in_buffer[5];
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if (length_remaining < 0
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|| length_remaining > sizeof(mms->in_buffer) - 8) {
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dprintf("Incoming data len %d exceeds buffer len %d\n",
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length_remaining, sizeof(mms->in_buffer));
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return -1;
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}
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mms->remaining_in_len = length_remaining;
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mms->read_in_ptr = mms->in_buffer;
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read_result= url_read_complete(mms->mms_hd, mms->in_buffer, length_remaining);
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if(read_result != length_remaining) {
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dprintf(NULL, "read_bytes result: %d asking for %d\n",
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read_result, length_remaining);
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return -1;
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} else {
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// if we successfully read everything.
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if(packet_id_type == mms->header_packet_id) {
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packet_type = SC_PKT_ASF_HEADER;
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// Store the asf header
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if(!mms->header_parsed) {
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void *p = av_realloc(mms->asf_header,
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mms->asf_header_size
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+ mms->remaining_in_len);
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if (!p) {
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av_freep(&mms->asf_header);
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return AVERROR(ENOMEM);
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}
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mms->asf_header = p;
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memcpy(mms->asf_header + mms->asf_header_size,
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mms->read_in_ptr,
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mms->remaining_in_len);
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mms->asf_header_size += mms->remaining_in_len;
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}
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} else if(packet_id_type == mms->packet_id) {
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packet_type = SC_PKT_ASF_MEDIA;
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} else {
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dprintf(NULL, "packet id type %d is old.", packet_id_type);
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continue;
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}
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}
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}
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// preprocess some packet type
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if(packet_type == SC_PKT_KEEPALIVE) {
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send_keepalive_packet(mms);
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continue;
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} else if(packet_type == SC_PKT_STREAM_CHANGING) {
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handle_packet_stream_changing_type(mms);
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} else if(packet_type == SC_PKT_ASF_MEDIA) {
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pad_media_packet(mms);
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}
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return packet_type;
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} else {
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if(read_result<0) {
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dprintf(NULL, "Read error (or cancelled) returned %d!\n", read_result);
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packet_type = SC_PKT_CANCEL;
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} else {
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dprintf(NULL, "Read result of zero?!\n");
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packet_type = SC_PKT_NO_DATA;
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}
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return packet_type;
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}
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}
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}
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static int mms_safe_send_recv(MMSContext *mms,
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int (*send_fun)(MMSContext *mms),
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const MMSSCPacketType expect_type)
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{
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MMSSCPacketType type;
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if(send_fun) {
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int ret = send_fun(mms);
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if (ret < 0) {
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dprintf(NULL, "Send Packet error before expecting recv packet %d\n", expect_type);
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return ret;
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}
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}
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if ((type = get_tcp_server_response(mms)) != expect_type) {
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dprintf(NULL,"Unexpected packet type %d with type %d\n", type, expect_type);
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return -1;
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} else {
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return 0;
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}
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}
|
||||
|
||||
static int send_media_header_request(MMSContext *mms)
|
||||
{
|
||||
start_command_packet(mms, CS_PKT_MEDIA_HEADER_REQUEST);
|
||||
insert_command_prefixes(mms, 1, 0);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0x00800000);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0xffffffff);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0);
|
||||
|
||||
// the media preroll value in milliseconds?
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0x40AC2000);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 2);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0);
|
||||
|
||||
return send_command_packet(mms);
|
||||
}
|
||||
|
||||
/** Send the initial handshake. */
|
||||
static int send_startup_packet(MMSContext *mms)
|
||||
{
|
||||
char data_string[256];
|
||||
// SubscriberName is defined in MS specification linked below.
|
||||
// The guid value can be any valid value.
|
||||
// http://download.microsoft.com/
|
||||
// download/9/5/E/95EF66AF-9026-4BB0-A41D-A4F81802D92C/%5BMS-WMSP%5D.pdf
|
||||
snprintf(data_string, sizeof(data_string),
|
||||
"NSPlayer/7.0.0.1956; {%s}; Host: %s",
|
||||
"7E667F5D-A661-495E-A512-F55686DDA178", mms->host);
|
||||
|
||||
start_command_packet(mms, CS_PKT_INITIAL);
|
||||
insert_command_prefixes(mms, 0, 0x0004000b);
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0x0003001c);
|
||||
mms_put_utf16(mms, data_string);
|
||||
return send_command_packet(mms);
|
||||
}
|
||||
|
||||
static int asf_header_parser(MMSContext *mms)
|
||||
{
|
||||
uint8_t *p = mms->asf_header;
|
||||
uint8_t *end;
|
||||
int flags, stream_id, real_header_size;
|
||||
mms->stream_num = 0;
|
||||
|
||||
if (mms->asf_header_size < sizeof(ff_asf_guid) * 2 + 22 ||
|
||||
memcmp(p, ff_asf_header, sizeof(ff_asf_guid)))
|
||||
return -1;
|
||||
|
||||
real_header_size = AV_RL64(p + sizeof(ff_asf_guid));
|
||||
end = mms->asf_header + real_header_size;
|
||||
|
||||
p += sizeof(ff_asf_guid) + 14;
|
||||
while(end - p >= sizeof(ff_asf_guid) + 8) {
|
||||
uint64_t chunksize = AV_RL64(p + sizeof(ff_asf_guid));
|
||||
if (!chunksize || chunksize > end - p) {
|
||||
dprintf("chunksize is exceptional value:%d!\n", chunksize);
|
||||
return -1;
|
||||
}
|
||||
if (!memcmp(p, ff_asf_file_header, sizeof(ff_asf_guid))) {
|
||||
/* read packet size */
|
||||
if (end - p > sizeof(ff_asf_guid) * 2 + 68) {
|
||||
mms->asf_packet_len = AV_RL32(p + sizeof(ff_asf_guid) * 2 + 64);
|
||||
if (mms->asf_packet_len <= 0 || mms->asf_packet_len > sizeof(mms->in_buffer)) {
|
||||
dprintf(NULL,"Too large packet len:%d"
|
||||
" may overwrite in_buffer when padding", mms->asf_packet_len);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
} else if (!memcmp(p, ff_asf_stream_header, sizeof(ff_asf_guid))) {
|
||||
flags = AV_RL16(p + sizeof(ff_asf_guid)*3 + 24);
|
||||
stream_id = flags & 0x7F;
|
||||
//The second condition is for checking CS_PKT_STREAM_ID_REQUEST packet size,
|
||||
//we can calcuate the packet size by stream_num.
|
||||
//Please see function send_stream_selection_request().
|
||||
if (mms->stream_num < MAX_STREAMS &&
|
||||
46 + mms->stream_num * 6 < sizeof(mms->out_buffer)) {
|
||||
mms->streams[mms->stream_num].id = stream_id;
|
||||
mms->stream_num++;
|
||||
} else {
|
||||
dprintf("Too many streams.\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
p += chunksize;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** Send MMST stream selection command based on the AVStream->discard values. */
|
||||
static int send_stream_selection_request(MMSContext *mms)
|
||||
{
|
||||
int i;
|
||||
|
||||
// send the streams we want back...
|
||||
start_command_packet(mms, CS_PKT_STREAM_ID_REQUEST);
|
||||
bytestream_put_le32(&mms->write_out_ptr, mms->stream_num); // stream nums
|
||||
for(i= 0; i<mms->stream_num; i++) {
|
||||
bytestream_put_le16(&mms->write_out_ptr, 0xffff); // flags
|
||||
bytestream_put_le16(&mms->write_out_ptr, mms->streams[i].id); // stream id
|
||||
bytestream_put_le16(&mms->write_out_ptr, 0); // selection
|
||||
}
|
||||
|
||||
bytestream_put_le16(&mms->write_out_ptr, 0);
|
||||
|
||||
return send_command_packet(mms);
|
||||
}
|
||||
|
||||
static int read_data(MMSContext *mms, uint8_t *buf, const int buf_size)
|
||||
{
|
||||
int read_size;
|
||||
read_size = FFMIN(buf_size, mms->remaining_in_len);
|
||||
memcpy(buf, mms->read_in_ptr, read_size);
|
||||
mms->remaining_in_len -= read_size;
|
||||
mms->read_in_ptr += read_size;
|
||||
return read_size;
|
||||
}
|
||||
|
||||
/** 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, read_header_size = 0;
|
||||
int size_to_copy;
|
||||
|
||||
do {
|
||||
if(read_header_size < mms->asf_header_size && !mms->is_playing) {
|
||||
/* Read from ASF header buffer */
|
||||
size_to_copy= FFMIN(buf_size,
|
||||
mms->asf_header_size - read_header_size);
|
||||
memcpy(buf, mms->asf_header + read_header_size, size_to_copy);
|
||||
read_header_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 - read_header_size);
|
||||
if (mms->asf_header_size == read_header_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 send_close_packet(MMSContext *mms)
|
||||
{
|
||||
start_command_packet(mms, CS_PKT_STREAM_CLOSE);
|
||||
insert_command_prefixes(mms, 1, 1);
|
||||
|
||||
return send_command_packet(mms);
|
||||
}
|
||||
|
||||
/** Close the MMSH/MMST connection */
|
||||
static int mms_close(URLContext *h)
|
||||
{
|
||||
MMSContext *mms = (MMSContext *)h->priv_data;
|
||||
|
||||
if(mms->mms_hd) {
|
||||
send_close_packet(mms);
|
||||
url_close(mms->mms_hd);
|
||||
}
|
||||
|
||||
/* free all separately allocated pointers in mms */
|
||||
av_free(mms->asf_header);
|
||||
av_freep(&h->priv_data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
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
|
||||
ff_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_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;
|
||||
}
|
||||
|
||||
static int send_media_packet_request(MMSContext *mms)
|
||||
{
|
||||
start_command_packet(mms, CS_PKT_START_FROM_PKT_ID);
|
||||
insert_command_prefixes(mms, 1, 0x0001FFFF);
|
||||
bytestream_put_le64(&mms->write_out_ptr, 0); // seek timestamp
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0xffffffff); // unknown
|
||||
bytestream_put_le32(&mms->write_out_ptr, 0xffffffff); // packet offset
|
||||
bytestream_put_byte(&mms->write_out_ptr, 0xff); // max stream time limit
|
||||
bytestream_put_byte(&mms->write_out_ptr, 0xff); // max stream time limit
|
||||
bytestream_put_byte(&mms->write_out_ptr, 0xff); // max stream time limit
|
||||
bytestream_put_byte(&mms->write_out_ptr, 0x00); // stream time limit flag
|
||||
|
||||
mms->packet_id++; // new packet_id
|
||||
bytestream_put_le32(&mms->write_out_ptr, mms->packet_id);
|
||||
return send_command_packet(mms);
|
||||
}
|
||||
|
||||
|
||||
static void clear_stream_buffers(MMSContext *mms)
|
||||
{
|
||||
mms->remaining_in_len = 0;
|
||||
mms->read_in_ptr = mms->in_buffer;
|
||||
}
|
||||
|
||||
/** 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);
|
||||
}
|
||||
|
||||
URLProtocol mmst_protocol = {
|
||||
"mmst",
|
||||
mms_open,
|
||||
mms_read,
|
||||
NULL, // write
|
||||
NULL, // seek
|
||||
mms_close,
|
||||
};
|
||||
Loading…
Reference in New Issue