[FFmpeg-cvslog] r23301 - in trunk: Changelog doc/general.texi libavformat/Makefile libavformat/allformats.c libavformat/avformat.h libavformat/mmst.c
rbultje
subversion
Mon May 24 23:59:32 CEST 2010
Author: rbultje
Date: Mon May 24 23:59:32 2010
New Revision: 23301
Log:
MMS-over-TCP protocol support. Patch by Zhentan Feng <spyfeng gmail com>.
Added:
trunk/libavformat/mmst.c
Modified:
trunk/Changelog
trunk/doc/general.texi
trunk/libavformat/Makefile
trunk/libavformat/allformats.c
trunk/libavformat/avformat.h
Modified: trunk/Changelog
==============================================================================
--- trunk/Changelog Mon May 24 23:58:47 2010 (r23300)
+++ trunk/Changelog Mon May 24 23:59:32 2010 (r23301)
@@ -6,6 +6,7 @@ version <next>:
- WebM support in Matroska demuxer
- low overhead Ogg muxing
+- MMS-TCP support
Modified: trunk/doc/general.texi
==============================================================================
--- trunk/doc/general.texi Mon May 24 23:58:47 2010 (r23300)
+++ trunk/doc/general.texi Mon May 24 23:59:32 2010 (r23301)
@@ -687,6 +687,7 @@ performance on systems without hardware
@item file @tab X
@item Gopher @tab X
@item HTTP @tab X
+ at item MMS @tab X
@item pipe @tab X
@item RTP @tab X
@item TCP @tab X
Modified: trunk/libavformat/Makefile
==============================================================================
--- trunk/libavformat/Makefile Mon May 24 23:58:47 2010 (r23300)
+++ trunk/libavformat/Makefile Mon May 24 23:59:32 2010 (r23301)
@@ -275,6 +275,7 @@ OBJS+= avio.o aviobuf.o
OBJS-$(CONFIG_FILE_PROTOCOL) += file.o
OBJS-$(CONFIG_GOPHER_PROTOCOL) += gopher.o
OBJS-$(CONFIG_HTTP_PROTOCOL) += http.o httpauth.o
+OBJS-$(CONFIG_MMST_PROTOCOL) += mmst.o asf.o
OBJS-$(CONFIG_PIPE_PROTOCOL) += file.o
# external or internal rtmp
Modified: trunk/libavformat/allformats.c
==============================================================================
--- trunk/libavformat/allformats.c Mon May 24 23:58:47 2010 (r23300)
+++ trunk/libavformat/allformats.c Mon May 24 23:59:32 2010 (r23301)
@@ -219,6 +219,7 @@ void av_register_all(void)
REGISTER_PROTOCOL (FILE, file);
REGISTER_PROTOCOL (GOPHER, gopher);
REGISTER_PROTOCOL (HTTP, http);
+ REGISTER_PROTOCOL (MMST, mmst);
REGISTER_PROTOCOL (PIPE, pipe);
REGISTER_PROTOCOL (RTMP, rtmp);
#if CONFIG_LIBRTMP
Modified: trunk/libavformat/avformat.h
==============================================================================
--- trunk/libavformat/avformat.h Mon May 24 23:58:47 2010 (r23300)
+++ trunk/libavformat/avformat.h Mon May 24 23:59:32 2010 (r23301)
@@ -22,8 +22,8 @@
#define AVFORMAT_AVFORMAT_H
#define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 64
-#define LIBAVFORMAT_VERSION_MICRO 1
+#define LIBAVFORMAT_VERSION_MINOR 65
+#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
Added: trunk/libavformat/mmst.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ trunk/libavformat/mmst.c Mon May 24 23:59:32 2010 (r23301)
@@ -0,0 +1,690 @@
+/*
+ * MMS protocol over TCP
+ * Copyright (c) 2006,2007 Ryan Martell
+ * Copyright (c) 2007 Bj?rn Axelsson
+ * Copyright (c) 2010 Zhentan Feng <spyfeng at gmail dot com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "avformat.h"
+#include "internal.h"
+#include "libavutil/intreadwrite.h"
+#include "libavcodec/bytestream.h"
+#include "network.h"
+#include "asf.h"
+
+#define LOCAL_ADDRESS 0xc0a80081 // FIXME get and use correct local ip address.
+#define LOCAL_PORT 1037 // as above.
+/** Client to server packet types. */
+typedef enum {
+ CS_PKT_INITIAL = 0x01,
+ CS_PKT_PROTOCOL_SELECT = 0x02,
+ CS_PKT_MEDIA_FILE_REQUEST = 0x05,
+ CS_PKT_START_FROM_PKT_ID = 0x07,
+ CS_PKT_STREAM_PAUSE = 0x09,
+ CS_PKT_STREAM_CLOSE = 0x0d,
+ CS_PKT_MEDIA_HEADER_REQUEST = 0x15,
+ CS_PKT_TIMING_DATA_REQUEST = 0x18,
+ CS_PKT_USER_PASSWORD = 0x1a,
+ CS_PKT_KEEPALIVE = 0x1b,
+ CS_PKT_STREAM_ID_REQUEST = 0x33,
+} MMSCSPacketType;
+
+/** Server to client packet types. */
+typedef enum {
+ /** Control packets. */
+ /*@{*/
+ SC_PKT_CLIENT_ACCEPTED = 0x01,
+ SC_PKT_PROTOCOL_ACCEPTED = 0x02,
+ SC_PKT_PROTOCOL_FAILED = 0x03,
+ SC_PKT_MEDIA_PKT_FOLLOWS = 0x05,
+ SC_PKT_MEDIA_FILE_DETAILS = 0x06,
+ SC_PKT_HEADER_REQUEST_ACCEPTED = 0x11,
+ SC_PKT_TIMING_TEST_REPLY = 0x15,
+ SC_PKT_PASSWORD_REQUIRED = 0x1a,
+ SC_PKT_KEEPALIVE = 0x1b,
+ SC_PKT_STREAM_STOPPED = 0x1e,
+ SC_PKT_STREAM_CHANGING = 0x20,
+ SC_PKT_STREAM_ID_ACCEPTED = 0x21,
+ /*@}*/
+
+ /** Pseudo packets. */
+ /*@{*/
+ SC_PKT_CANCEL = -1,
+ SC_PKT_NO_DATA = -2,
+ /*@}*/
+
+ /** Data packets. */
+ /*@{*/
+ SC_PKT_ASF_HEADER = 0x010000,// make it bigger than 0xFF in case of
+ SC_PKT_ASF_MEDIA = 0x010001,// receiving false data packets.
+ /*@}*/
+} MMSSCPacketType;
+
+typedef struct {
+ int id;
+}MMSStream;
+
+typedef struct {
+ int outgoing_packet_seq; ///< Outgoing packet sequence number.
+ char path[256]; ///< Path of the resource being asked for.
+ char host[128]; ///< Host of the resources.
+
+ URLContext *mms_hd; ///< TCP connection handle
+ MMSStream streams[MAX_STREAMS];
+
+ /** Buffer for outgoing packets. */
+ /*@{*/
+ uint8_t *write_out_ptr; ///< Pointer for writting the buffer.
+ uint8_t out_buffer[512]; ///< Buffer for outgoing packet.
+ /*@}*/
+
+ /** Buffer for incoming packets. */
+ /*@{*/
+ uint8_t in_buffer[8192]; ///< Buffer for incoming packets.
+ uint8_t *read_in_ptr; ///< Pointer for reading from incoming buffer.
+ int remaining_in_len; ///< Reading length from incoming buffer.
+ /*@}*/
+
+ int incoming_packet_seq; ///< Incoming packet sequence number.
+ int incoming_flags; ///< Incoming packet flags.
+
+ int packet_id; ///< Identifier for packets in the current stream.
+ unsigned int header_packet_id; ///< default is 2.
+
+ /** Internal handling of the ASF header */
+ /*@{*/
+ uint8_t *asf_header; ///< Stored ASF header.
+ int asf_header_size; ///< Size of stored ASF header.
+ int header_parsed; ///< The header has been received and parsed.
+ int asf_packet_len;
+ /*@}*/
+
+ int stream_num; ///< stream numbers.
+ int is_playing;
+} MMSContext;
+
+/** Create MMST command packet header */
+static void start_command_packet(MMSContext *mms, MMSCSPacketType packet_type)
+{
+ mms->write_out_ptr = mms->out_buffer;
+
+ bytestream_put_le32(&mms->write_out_ptr, 1); // start sequence
+ bytestream_put_le32(&mms->write_out_ptr, 0xb00bface);
+ bytestream_put_le32(&mms->write_out_ptr, 0); // Length starts from after the protocol type bytes
+ bytestream_put_le32(&mms->write_out_ptr, MKTAG('M','M','S',' '));
+ bytestream_put_le32(&mms->write_out_ptr, 0);
+ bytestream_put_le32(&mms->write_out_ptr, mms->outgoing_packet_seq++);
+ bytestream_put_le64(&mms->write_out_ptr, 0); // timestamp
+ bytestream_put_le32(&mms->write_out_ptr, 0);
+ bytestream_put_le16(&mms->write_out_ptr, packet_type);
+ bytestream_put_le16(&mms->write_out_ptr, 3); // direction to server
+}
+
+/** Add prefixes to MMST command packet. */
+static void insert_command_prefixes(MMSContext *mms,
+ uint32_t prefix1, uint32_t prefix2)
+{
+ bytestream_put_le32(&mms->write_out_ptr, prefix1); // first prefix
+ bytestream_put_le32(&mms->write_out_ptr, prefix2); // second prefix
+}
+
+/** Send a prepared MMST command packet. */
+static int send_command_packet(MMSContext *mms)
+{
+ int exact_length= mms->write_out_ptr - mms->out_buffer;
+ int first_length= exact_length - 16;
+ int len8= first_length/8;
+ int write_result;
+
+ // update packet length fields.
+ AV_WL32(mms->out_buffer + 8, first_length);
+ AV_WL32(mms->out_buffer + 16, len8);
+ AV_WL32(mms->out_buffer + 32, len8-2);
+
+ // write it out.
+ write_result= url_write(mms->mms_hd, mms->out_buffer, exact_length);
+ if(write_result != exact_length) {
+ dprintf(NULL, "url_write returned: %d != %d\n",
+ write_result, exact_length);
+ return AVERROR_IO;
+ }
+
+ return 0;
+}
+
+static void mms_put_utf16(MMSContext *mms, uint8_t *src)
+{
+ ByteIOContext bic;
+ int size = mms->write_out_ptr - mms->out_buffer;
+ int len;
+ init_put_byte(&bic, mms->write_out_ptr,
+ sizeof(mms->out_buffer) - size, 1, NULL, NULL, NULL, NULL);
+
+ len = ff_put_str16_nolen(&bic, src);
+ mms->write_out_ptr += len;
+}
+
+static int send_protocol_select(MMSContext *mms)
+{
+ char data_string[256];
+
+ start_command_packet(mms, CS_PKT_PROTOCOL_SELECT);
+ insert_command_prefixes(mms, 0, 0xffffffff);
+ bytestream_put_le32(&mms->write_out_ptr, 0); // maxFunnelBytes
+ bytestream_put_le32(&mms->write_out_ptr, 0x00989680); // maxbitRate
+ bytestream_put_le32(&mms->write_out_ptr, 2); // funnelMode
+ snprintf(data_string, sizeof(data_string), "\\\\%d.%d.%d.%d\\%s\\%d",
+ (LOCAL_ADDRESS>>24)&0xff,
+ (LOCAL_ADDRESS>>16)&0xff,
+ (LOCAL_ADDRESS>>8)&0xff,
+ LOCAL_ADDRESS&0xff,
+ "TCP", // or UDP
+ LOCAL_PORT);
+
+ mms_put_utf16(mms, data_string);
+ return send_command_packet(mms);
+}
+
+static int send_media_file_request(MMSContext *mms)
+{
+ start_command_packet(mms, CS_PKT_MEDIA_FILE_REQUEST);
+ insert_command_prefixes(mms, 1, 0xffffffff);
+ bytestream_put_le32(&mms->write_out_ptr, 0);
+ bytestream_put_le32(&mms->write_out_ptr, 0);
+ mms_put_utf16(mms, mms->path + 1); // +1 for skip "/"
+
+ return send_command_packet(mms);
+}
+
+static void handle_packet_stream_changing_type(MMSContext *mms)
+{
+ dprintf(NULL, "Stream changing!\n");
+
+ // 40 is the packet header size, 7 is the prefix size.
+ mms->header_packet_id= AV_RL32(mms->in_buffer + 40 + 7);
+ dprintf(NULL, "Changed header prefix to 0x%x", mms->header_packet_id);
+}
+
+static int send_keepalive_packet(MMSContext *mms)
+{
+ // respond to a keepalive with a keepalive...
+ start_command_packet(mms, CS_PKT_KEEPALIVE);
+ insert_command_prefixes(mms, 1, 0x100FFFF);
+ return send_command_packet(mms);
+}
+
+/** Pad media packets smaller than max_packet_size and/or adjust read position
+ * after a seek. */
+static void pad_media_packet(MMSContext *mms)
+{
+ if(mms->remaining_in_len<mms->asf_packet_len) {
+ int padding_size = mms->asf_packet_len - mms->remaining_in_len;
+ memset(mms->in_buffer + mms->remaining_in_len, 0, padding_size);
+ mms->remaining_in_len += padding_size;
+ }
+}
+
+/** Read incoming MMST media, header or command packet. */
+static MMSSCPacketType get_tcp_server_response(MMSContext *mms)
+{
+ int read_result;
+ MMSSCPacketType packet_type= -1;
+
+ for(;;) {
+ if((read_result= url_read_complete(mms->mms_hd, mms->in_buffer, 8))==8) {
+ // handle command packet.
+ if(AV_RL32(mms->in_buffer + 4)==0xb00bface) {
+ mms->incoming_flags= mms->in_buffer[3];
+ read_result= url_read_complete(mms->mms_hd, mms->in_buffer+8, 4);
+ if(read_result == 4) {
+ int length_remaining= AV_RL32(mms->in_buffer+8) + 4;
+
+ dprintf(NULL, "Length remaining is %d\n", length_remaining);
+ // read the rest of the packet.
+ if (length_remaining < 0
+ || length_remaining > sizeof(mms->in_buffer) - 12) {
+ dprintf("Incoming message len %d exceeds buffer len %d\n",
+ length_remaining, sizeof(mms->in_buffer) - 12);
+ return -1;
+ }
+ read_result = url_read_complete(mms->mms_hd, mms->in_buffer + 12,
+ length_remaining) ;
+ if (read_result == length_remaining) {
+ packet_type= AV_RL16(mms->in_buffer+36);
+ } else {
+ dprintf(NULL, "read for packet type failed%d!\n", read_result);
+ return -1;
+ }
+ } else {
+ dprintf(NULL, "read for length remaining failed%d!\n", read_result);
+ return -1;
+ }
+ } else {
+ int length_remaining;
+ int packet_id_type;
+ int tmp;
+
+ assert(mms->remaining_in_len==0);
+
+ // note we cache the first 8 bytes,
+ // then fill up the buffer with the others
+ tmp = AV_RL16(mms->in_buffer + 6);
+ length_remaining = (tmp - 8) & 0xffff;
+ mms->incoming_packet_seq = AV_RL32(mms->in_buffer);
+ packet_id_type = mms->in_buffer[4];
+ mms->incoming_flags = mms->in_buffer[5];
+
+ if (length_remaining < 0
+ || length_remaining > sizeof(mms->in_buffer) - 8) {
+ dprintf("Incoming data len %d exceeds buffer len %d\n",
+ length_remaining, sizeof(mms->in_buffer));
+ return -1;
+ }
+ mms->remaining_in_len = length_remaining;
+ mms->read_in_ptr = mms->in_buffer;
+ read_result= url_read_complete(mms->mms_hd, mms->in_buffer, length_remaining);
+ if(read_result != length_remaining) {
+ dprintf(NULL, "read_bytes result: %d asking for %d\n",
+ read_result, length_remaining);
+ return -1;
+ } else {
+ // if we successfully read everything.
+ if(packet_id_type == mms->header_packet_id) {
+ packet_type = SC_PKT_ASF_HEADER;
+ // Store the asf header
+ if(!mms->header_parsed) {
+ void *p = av_realloc(mms->asf_header,
+ mms->asf_header_size
+ + mms->remaining_in_len);
+ if (!p) {
+ av_freep(&mms->asf_header);
+ return AVERROR(ENOMEM);
+ }
+ mms->asf_header = p;
+ memcpy(mms->asf_header + mms->asf_header_size,
+ mms->read_in_ptr,
+ mms->remaining_in_len);
+ mms->asf_header_size += mms->remaining_in_len;
+ }
+ } else if(packet_id_type == mms->packet_id) {
+ packet_type = SC_PKT_ASF_MEDIA;
+ } else {
+ dprintf(NULL, "packet id type %d is old.", packet_id_type);
+ continue;
+ }
+ }
+ }
+
+ // preprocess some packet type
+ if(packet_type == SC_PKT_KEEPALIVE) {
+ send_keepalive_packet(mms);
+ continue;
+ } else if(packet_type == SC_PKT_STREAM_CHANGING) {
+ handle_packet_stream_changing_type(mms);
+ } else if(packet_type == SC_PKT_ASF_MEDIA) {
+ pad_media_packet(mms);
+ }
+ return packet_type;
+ } else {
+ if(read_result<0) {
+ dprintf(NULL, "Read error (or cancelled) returned %d!\n", read_result);
+ packet_type = SC_PKT_CANCEL;
+ } else {
+ dprintf(NULL, "Read result of zero?!\n");
+ packet_type = SC_PKT_NO_DATA;
+ }
+ return packet_type;
+ }
+ }
+}
+
+static int mms_safe_send_recv(MMSContext *mms,
+ int (*send_fun)(MMSContext *mms),
+ const MMSSCPacketType expect_type)
+{
+ MMSSCPacketType type;
+ if(send_fun) {
+ int ret = send_fun(mms);
+ if (ret < 0) {
+ dprintf(NULL, "Send Packet error before expecting recv packet %d\n", expect_type);
+ return ret;
+ }
+ }
+
+ if ((type = get_tcp_server_response(mms)) != expect_type) {
+ dprintf(NULL,"Unexpected packet type %d with type %d\n", type, expect_type);
+ return -1;
+ } else {
+ return 0;
+ }
+}
+
+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,
+};
More information about the ffmpeg-cvslog
mailing list