FireWire DV/HDV input device using libiec61883

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

9 files changed, 526 insertions, 1 deletions

diff --git a/Changelog b/Changelog
index 6bd20dd73e..b5db610c40 100644
--- a/Changelog
+++ b/Changelog
@@ -20,6 +20,7 @@ version next:
 - SAMI demuxer and decoder
 - RealText demuxer and decoder
 - Heart Of Darkness PAF playback support
+- iec61883 device
 
 
 version 0.11:
diff --git a/MAINTAINERS b/MAINTAINERS
index eb6308dc88..1a9f29b9c0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -263,6 +263,7 @@ libavdevice
     libavdevice/avdevice.h
 
 
+  iec61883.c                            Georg Lippitsch
   libdc1394.c                           Roman Shaposhnik
   v4l2.c                                Luca Abeni
   vfwcap.c                              Ramiro Polla
diff --git a/configure b/configure
index 6ac4051ab5..c451f6b564 100755
--- a/configure
+++ b/configure
@@ -1677,6 +1677,7 @@ dshow_indev_deps="IBaseFilter"
 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
 dv1394_indev_deps="dv1394 dv_demuxer"
 fbdev_indev_deps="linux_fb_h"
+iec61883_indev_deps="iec61883"
 jack_indev_deps="jack_jack_h sem_timedwait"
 lavfi_indev_deps="avfilter"
 libcdio_indev_deps="libcdio"
@@ -2820,6 +2821,7 @@ case $target_os in
     linux)
         add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
         enable dv1394
+        enable iec61883
         ;;
     irix*)
         target_os=irix
@@ -3285,6 +3287,7 @@ enabled avisynth   && require2 vfw32 "windows.h vfw.h" AVIFileInit -lavifil32
 enabled fontconfig && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
 enabled frei0r     && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
 enabled gnutls     && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
+enabled iec61883   && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
 enabled libaacplus && require  "libaacplus >= 2.0.0" aacplus.h aacplusEncOpen -laacplus
 enabled libass     && require_pkg_config libass ass/ass.h ass_library_init
 enabled libbluray  && require libbluray libbluray/bluray.h bd_open -lbluray
diff --git a/doc/indevs.texi b/doc/indevs.texi
index e699e11f42..dd167b8060 100644
--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -179,6 +179,55 @@ ffmpeg -f fbdev -frames:v 1 -r 1 -i /dev/fb0 screenshot.jpeg
 
 See also @url{http://linux-fbdev.sourceforge.net/}, and fbset(1).
 
+@section iec61883
+
+FireWire DV/HDV input device using libiec61883.
+
+The iec61883 capture device supports capturing from a video device
+connected via IEEE1394 (FireWire), using libiec61883 and the new Linux
+FireWire stack (juju). This is the default DV/HDV input method in Linux
+Kernel 2.6.37 and later, since the old FireWire stack was removed.
+
+Specify the FireWire port to be used as input file, or "auto"
+to choose the first port connected.
+
+@subsection Options
+
+@table @option
+
+@item dvtype
+Override autodetection of DV/HDV. This should only be used if auto
+detection does not work, or if usage of a different device type
+should be prohibited. Treating a DV device as HDV (or vice versa) will
+not work and result in undefined behavior.
+The values @option{auto}, @option{dv} and @option{hdv} are supported.
+
+@item dvbuffer
+Set maxiumum size of buffer for incoming data, in frames. For DV, this
+is an exact value. For HDV, it is not frame exact, since HDV does
+not have a fixed frame size.
+
+@end table
+
+@subsection Examples
+
+@itemize
+
+@item
+Grab and show the input of a FireWire DV/HDV device.
+@example
+ffplay -f iec61883 -i auto
+@end example
+
+@item
+Grab and record the input of a FireWire DV/HDV device,
+using a packet buffer of 100000 packets if the source is HDV.
+@example
+ffmpeg -f iec61883 -i auto -hdvbuffer 100000 out.mpg
+@end example
+
+@end itemize
+
 @section jack
 
 JACK input device.
diff --git a/libavdevice/Makefile b/libavdevice/Makefile
index 7dc4b7459a..4759a82683 100644
--- a/libavdevice/Makefile
+++ b/libavdevice/Makefile
@@ -21,6 +21,7 @@ OBJS-$(CONFIG_DSHOW_INDEV)               += dshow.o dshow_enummediatypes.o \
                                             dshow_pin.o dshow_common.o
 OBJS-$(CONFIG_DV1394_INDEV)              += dv1394.o
 OBJS-$(CONFIG_FBDEV_INDEV)               += fbdev.o
+OBJS-$(CONFIG_IEC61883_INDEV)            += iec61883.o
 OBJS-$(CONFIG_JACK_INDEV)                += jack_audio.o timefilter.o
 OBJS-$(CONFIG_LAVFI_INDEV)               += lavfi.o
 OBJS-$(CONFIG_OPENAL_INDEV)              += openal-dec.o
diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c
index 86ebfee062..2a0bffb166 100644
--- a/libavdevice/alldevices.c
+++ b/libavdevice/alldevices.c
@@ -43,6 +43,7 @@ void avdevice_register_all(void)
     REGISTER_INDEV    (DSHOW, dshow);
     REGISTER_INDEV    (DV1394, dv1394);
     REGISTER_INDEV    (FBDEV, fbdev);
+    REGISTER_INDEV    (IEC61883, iec61883);
     REGISTER_INDEV    (JACK, jack);
     REGISTER_INDEV    (LAVFI, lavfi);
     REGISTER_INDEV    (OPENAL, openal);
diff --git a/libavdevice/iec61883.c b/libavdevice/iec61883.c
new file mode 100644
index 0000000000..25cdf105f6
--- /dev/null
+++ b/libavdevice/iec61883.c
@@ -0,0 +1,466 @@
+/*
+ * Copyright (c) 2012 Georg Lippitsch <georg.lippitsch@gmx.at>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * libiec61883 interface
+ */
+
+#include <sys/poll.h>
+#include <libraw1394/raw1394.h>
+#include <libavc1394/avc1394.h>
+#include <libavc1394/rom1394.h>
+#include <libiec61883/iec61883.h>
+#include "libavformat/dv.h"
+#include "libavformat/mpegts.h"
+#include "libavutil/opt.h"
+#include "avdevice.h"
+
+#define THREADS HAVE_PTHREADS
+
+#if THREADS
+#include <pthread.h>
+#endif
+
+#define MOTDCT_SPEC_ID      0x00005068
+#define IEC61883_AUTO       0
+#define IEC61883_DV         1
+#define IEC61883_HDV        2
+
+/**
+ * For DV, one packet corresponds exactly to one frame.
+ * For HDV, these are MPEG2 transport stream packets.
+ * The queue is implemented as linked list.
+ */
+typedef struct DVPacket {
+    uint8_t *buf;                       ///< actual buffer data
+    int len;                            ///< size of buffer allocated
+    struct DVPacket *next;              ///< next DVPacket
+} DVPacket;
+
+struct iec61883_data {
+    AVClass *class;
+    raw1394handle_t raw1394;            ///< handle for libraw1394
+    iec61883_dv_fb_t iec61883_dv;       ///< handle for libiec61883 when used with DV
+    iec61883_mpeg2_t iec61883_mpeg2;    ///< handle for libiec61883 when used with HDV
+
+    DVDemuxContext *dv_demux;           ///< generic DV muxing/demuxing context
+    MpegTSContext *mpeg_demux;          ///< generic HDV muxing/demuxing context
+
+    DVPacket *queue_first;              ///< first element of packet queue
+    DVPacket *queue_last;               ///< last element of packet queue
+
+    int packets;                        ///< Number of packets queued
+    int max_packets;                    ///< Max. number of packets in queue
+
+    int bandwidth;                      ///< returned by libiec61883
+    int channel;                        ///< returned by libiec61883
+    int input_port;                     ///< returned by libiec61883
+    int type;                           ///< Stream type, to distinguish DV/HDV
+    int node;                           ///< returned by libiec61883
+    int output_port;                    ///< returned by libiec61883
+    int thread_loop;                    ///< Condition for thread while-loop
+    int receiving;                      ///< True as soon data from device available
+    int receive_error;                  ///< Set in receive task in case of error
+    int eof;                            ///< True as soon as no more data available
+
+    struct pollfd raw1394_poll;         ///< to poll for new data from libraw1394
+
+    /** Parse function for DV/HDV differs, so this is set before packets arrive */
+    int (*parse_queue)(struct iec61883_data *dv, AVPacket *pkt);
+
+#if THREADS
+    pthread_t receive_task_thread;
+    pthread_mutex_t mutex;
+    pthread_cond_t cond;
+#endif
+};
+
+static int iec61883_callback(unsigned char *data, int length,
+                             int complete, void *callback_data)
+{
+    struct iec61883_data *dv = callback_data;
+    DVPacket *packet;
+    int ret;
+
+#ifdef THREADS
+    pthread_mutex_lock(&dv->mutex);
+#endif
+
+    if (dv->packets >= dv->max_packets) {
+        av_log(NULL, AV_LOG_ERROR, "DV packet queue overrun, dropping.\n");
+        ret = 0;
+        goto exit;
+    }
+
+    packet = av_mallocz(sizeof(*packet));
+    if (!packet) {
+        ret = -1;
+        goto exit;
+    }
+
+    packet->buf = av_malloc(length);
+    if (!packet->buf) {
+        ret = -1;
+        goto exit;
+    }
+    packet->len = length;
+
+    memcpy(packet->buf, data, length);
+
+    if (dv->queue_first) {
+        dv->queue_last->next = packet;
+        dv->queue_last = packet;
+    } else {
+        dv->queue_first = packet;
+        dv->queue_last = packet;
+    }
+    dv->packets++;
+
+    ret = 0;
+
+exit:
+#ifdef THREADS
+    pthread_cond_signal(&dv->cond);
+    pthread_mutex_unlock(&dv->mutex);
+#endif
+    return ret;
+}
+
+static void *iec61883_receive_task(void *opaque)
+{
+    struct iec61883_data *dv = (struct iec61883_data *)opaque;
+    int result;
+
+#ifdef THREADS
+    while (dv->thread_loop)
+#endif
+    {
+        while ((result = poll(&dv->raw1394_poll, 1, 200)) < 0) {
+            if (!(errno == EAGAIN || errno == EINTR)) {
+                av_log(NULL, AV_LOG_ERROR, "Raw1394 poll error occurred.\n");
+                dv->receive_error = AVERROR(EIO);
+                return NULL;
+            }
+        }
+        if (result > 0 && ((dv->raw1394_poll.revents & POLLIN)
+                           || (dv->raw1394_poll.revents & POLLPRI))) {
+            dv->receiving = 1;
+            raw1394_loop_iterate(dv->raw1394);
+        } else if (dv->receiving) {
+            av_log(NULL, AV_LOG_ERROR, "No more input data available\n");
+#ifdef THREADS
+            pthread_mutex_lock(&dv->mutex);
+            dv->eof = 1;
+            pthread_cond_signal(&dv->cond);
+            pthread_mutex_unlock(&dv->mutex);
+#else
+            dv->eof = 1;
+#endif
+            return NULL;
+        }
+    }
+
+    return NULL;
+}
+
+static int iec61883_parse_queue_dv(struct iec61883_data *dv, AVPacket *pkt)
+{
+    DVPacket *packet;
+    int size;
+
+    size = avpriv_dv_get_packet(dv->dv_demux, pkt);
+    if (size > 0)
+        return size;
+
+    packet = dv->queue_first;
+    if (!packet)
+        return -1;
+
+    size = avpriv_dv_produce_packet(dv->dv_demux, pkt,
+                                    packet->buf, packet->len, -1);
+    pkt->destruct = av_destruct_packet;
+    dv->queue_first = packet->next;
+    av_free(packet);
+    dv->packets--;
+
+    if (size > 0)
+        return size;
+
+    return -1;
+}
+
+static int iec61883_parse_queue_hdv(struct iec61883_data *dv, AVPacket *pkt)
+{
+    DVPacket *packet;
+    int size;
+
+    while (dv->queue_first) {
+        packet = dv->queue_first;
+        size = ff_mpegts_parse_packet(dv->mpeg_demux, pkt, packet->buf,
+                                      packet->len);
+        dv->queue_first = packet->next;
+        av_free(packet->buf);
+        av_free(packet);
+        dv->packets--;
+
+        if (size > 0)
+            return size;
+    }
+
+    return -1;
+}
+
+static int iec61883_read_header(AVFormatContext *context)
+{
+    struct iec61883_data *dv = context->priv_data;
+    struct raw1394_portinfo pinf[16];
+    rom1394_directory rom_dir;
+    char *endptr;
+    int inport;
+    int nb_ports;
+    int port = -1;
+    int response;
+    int i, j = 0;
+
+    dv->input_port = -1;
+    dv->output_port = -1;
+    dv->channel = -1;
+
+    dv->raw1394 = raw1394_new_handle();
+
+    if (!dv->raw1394) {
+        av_log(context, AV_LOG_ERROR, "Failed to open IEEE1394 interface.\n");
+        return AVERROR(EIO);
+    }
+
+    if ((nb_ports = raw1394_get_port_info(dv->raw1394, pinf, 16)) < 0) {
+        av_log(context, AV_LOG_ERROR, "Failed to get number of IEEE1394 ports.\n");
+        goto fail;
+    }
+
+    inport = strtol(context->filename, &endptr, 10);
+    if (endptr != context->filename && *endptr == '\0') {
+        av_log(context, AV_LOG_INFO, "Selecting IEEE1394 port: %d\n", inport);
+        j = inport;
+        nb_ports = inport + 1;
+    } else if (strcmp(context->filename, "auto")) {
+        av_log(context, AV_LOG_ERROR, "Invalid input \"%s\", you should specify "
+               "\"auto\" for auto-detection, or the port number.\n", context->filename);
+        goto fail;
+    }
+
+    /* Select first AV/C tape recorder player node */
+
+    for (; j < nb_ports && port==-1; ++j) {
+        if (raw1394_set_port(dv->raw1394, j)) {
+            av_log(context, AV_LOG_ERROR, "Failed setting IEEE1394 port.\n");
+            goto fail;
+        }
+        for (i=0; i<raw1394_get_nodecount(dv->raw1394); ++i) {
+            if (rom1394_get_directory(dv->raw1394, i, &rom_dir) < 0)
+                continue;
+            if (((rom1394_get_node_type(&rom_dir) == ROM1394_NODE_TYPE_AVC) &&
+                 avc1394_check_subunit_type(dv->raw1394, i, AVC1394_SUBUNIT_TYPE_VCR)) ||
+                (rom_dir.unit_spec_id == MOTDCT_SPEC_ID)) {
+                rom1394_free_directory(&rom_dir);
+                dv->node = i;
+                port = j;
+                break;
+            }
+            rom1394_free_directory(&rom_dir);
+        }
+    }
+
+    if (port == -1) {
+        av_log(context, AV_LOG_ERROR, "No AV/C devices found.\n");
+        goto fail;
+    }
+
+    /* Find out if device is DV or HDV */
+
+    if (dv->type == IEC61883_AUTO) {
+        response = avc1394_transaction(dv->raw1394, dv->node,
+                                       AVC1394_CTYPE_STATUS |
+                                       AVC1394_SUBUNIT_TYPE_TAPE_RECORDER |
+                                       AVC1394_SUBUNIT_ID_0 |
+                                       AVC1394_VCR_COMMAND_OUTPUT_SIGNAL_MODE |
+                                       0xFF, 2);
+        response = AVC1394_GET_OPERAND0(response);
+        dv->type = (response == 0x10 || response == 0x90 || response == 0x1A || response == 0x9A) ?
+            IEC61883_HDV : IEC61883_DV;
+    }
+
+    /* Connect to device, and do initialization */
+
+    dv->channel = iec61883_cmp_connect(dv->raw1394, dv->node, &dv->output_port,
+                                       raw1394_get_local_id(dv->raw1394),
+                                       &dv->input_port, &dv->bandwidth);
+
+    if (dv->channel < 0)
+        dv->channel = 63;
+
+    if (!dv->max_packets)
+        dv->max_packets = 100;
+
+    if (dv->type == IEC61883_HDV) {
+
+        /* Init HDV receive */
+
+        avformat_new_stream(context, NULL);
+
+        dv->mpeg_demux = ff_mpegts_parse_open(context);
+        if (!dv->mpeg_demux)
+            goto fail;
+
+        dv->parse_queue = iec61883_parse_queue_hdv;
+
+        dv->iec61883_mpeg2 = iec61883_mpeg2_recv_init(dv->raw1394,
+                                                      (iec61883_mpeg2_recv_t)iec61883_callback,
+                                                      dv);
+
+        dv->max_packets *= 766;
+    } else {
+
+        /* Init DV receive */
+
+        dv->dv_demux = avpriv_dv_init_demux(context);
+        if (!dv->dv_demux)
+            goto fail;
+
+        dv->parse_queue = iec61883_parse_queue_dv;
+
+        dv->iec61883_dv = iec61883_dv_fb_init(dv->raw1394, iec61883_callback, dv);
+    }
+
+    dv->raw1394_poll.fd = raw1394_get_fd(dv->raw1394);
+    dv->raw1394_poll.events = POLLIN | POLLERR | POLLHUP | POLLPRI;
+
+    /* Actually start receiving */
+
+    if (dv->type == IEC61883_HDV)
+        iec61883_mpeg2_recv_start(dv->iec61883_mpeg2, dv->channel);
+    else
+        iec61883_dv_fb_start(dv->iec61883_dv, dv->channel);
+
+#if THREADS
+    dv->thread_loop = 1;
+    pthread_mutex_init(&dv->mutex, NULL);
+    pthread_cond_init(&dv->cond, NULL);
+    pthread_create(&dv->receive_task_thread, NULL, iec61883_receive_task, dv);
+#endif
+
+    return 0;
+
+fail:
+    raw1394_destroy_handle(dv->raw1394);
+    return AVERROR(EIO);
+}
+
+static int iec61883_read_packet(AVFormatContext *context, AVPacket *pkt)
+{
+    struct iec61883_data *dv = context->priv_data;
+    int size;
+
+    /**
+     * Try to parse frames from queue
+     */
+
+#ifdef THREADS
+    pthread_mutex_lock(&dv->mutex);
+    while ((size = dv->parse_queue(dv, pkt)) == -1)
+        if (!dv->eof)
+            pthread_cond_wait(&dv->cond, &dv->mutex);
+        else
+            break;
+    pthread_mutex_unlock(&dv->mutex);
+#else
+    int result;
+    while ((size = dv->parse_queue(dv, pkt)) == -1) {
+        iec61883_receive_task((void *)dv);
+        if (dv->receive_error)
+            return dv->receive_error;
+    }
+#endif
+
+    return size;
+}
+
+static int iec61883_close(AVFormatContext *context)
+{
+    struct iec61883_data *dv = context->priv_data;
+
+#if THREADS
+    dv->thread_loop = 0;
+    pthread_join(dv->receive_task_thread, NULL);
+    pthread_cond_destroy(&dv->cond);
+    pthread_mutex_destroy(&dv->mutex);
+#endif
+
+    if (dv->type == IEC61883_HDV) {
+        iec61883_mpeg2_recv_stop(dv->iec61883_mpeg2);
+        iec61883_mpeg2_close(dv->iec61883_mpeg2);
+        ff_mpegts_parse_close(dv->mpeg_demux);
+    } else {
+        iec61883_dv_fb_stop(dv->iec61883_dv);
+        iec61883_dv_fb_close(dv->iec61883_dv);
+    }
+    while (dv->queue_first) {
+        DVPacket *packet = dv->queue_first;
+        dv->queue_first = packet->next;
+        av_free(packet->buf);
+        av_free(packet);
+    }
+
+    iec61883_cmp_disconnect(dv->raw1394, dv->node, dv->output_port,
+                            raw1394_get_local_id(dv->raw1394),
+                            dv->input_port, dv->channel, dv->bandwidth);
+
+    raw1394_destroy_handle(dv->raw1394);
+
+    return 0;
+}
+
+static const AVOption options[] = {
+    { "dvtype", "override autodetection of DV/HDV", offsetof(struct iec61883_data, type), AV_OPT_TYPE_INT, {.dbl = IEC61883_AUTO}, IEC61883_AUTO, IEC61883_HDV, AV_OPT_FLAG_DECODING_PARAM, "dvtype" },
+    { "auto",   "auto detect DV/HDV", 0, AV_OPT_TYPE_CONST, {.dbl = IEC61883_AUTO}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" },
+    { "dv",     "force device being treated as DV device", 0, AV_OPT_TYPE_CONST, {.dbl = IEC61883_DV},   0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" },
+    { "hdv" ,   "force device being treated as HDV device", 0, AV_OPT_TYPE_CONST, {.dbl = IEC61883_HDV},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" },
+    { "dvbuffer", "set queue buffer size (in packets)", offsetof(struct iec61883_data, max_packets), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
+    { NULL },
+};
+
+static const AVClass iec61883_class = {
+    .class_name = "iec61883 indev",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_iec61883_demuxer = {
+    .name           = "iec61883",
+    .long_name      = NULL_IF_CONFIG_SMALL("libiec61883 (new DV1394) A/V input device"),
+    .priv_data_size = sizeof(struct iec61883_data),
+    .read_header    = iec61883_read_header,
+    .read_packet    = iec61883_read_packet,
+    .read_close     = iec61883_close,
+    .flags          = AVFMT_NOFILE,
+    .priv_class     = &iec61883_class,
+};
diff --git a/libavdevice/version.h b/libavdevice/version.h
index 3b1e9b5313..93a07bd33c 100644
--- a/libavdevice/version.h
+++ b/libavdevice/version.h
@@ -28,7 +28,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVDEVICE_VERSION_MAJOR  54
-#define LIBAVDEVICE_VERSION_MINOR   0
+#define LIBAVDEVICE_VERSION_MINOR   1
 #define LIBAVDEVICE_VERSION_MICRO 100
 
 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
diff --git a/libavformat/libavformat.v b/libavformat/libavformat.v
index 5b983cc210..f707e9c178 100644
--- a/libavformat/libavformat.v
+++ b/libavformat/libavformat.v
@@ -6,6 +6,9 @@ LIBAVFORMAT_$MAJOR {
                 ffm_set_write_index;
                 ffm_read_write_index;
                 ffm_write_write_index;
+                ff_mpegts_parse_close;
+                ff_mpegts_parse_open;
+                ff_mpegts_parse_packet;
                 ff_rtsp_parse_line;
                 ff_rtp_get_local_rtp_port;
                 ff_rtp_get_local_rtcp_port;