stbt-tv

#!/bin/bash

# Copyright 2013 YouView TV Ltd.
# License: LGPL v2.1 or (at your option) any later version (see
# https://github.com/stb-tester/stb-tester/blob/master/LICENSE for details).

#/ usage: stbt tv [-h] [-f] [-v] [source pipeline]
#/
#/ Show the video captured from the GStreamer source pipeline specified on the
#/ command line or in your stbt config file.
#/
#/ The appropriate sink for your system will be used, regardless of the
#/ sink_pipeline specified in your stbt configuration file.
#/
#/ Options:
#/   -h, --help     Show this help message and exit.
#/   -f             Do not show video output (i.e. direct the output to
#/                  'fakesink'). This is to activate the pass-through output of
#/                  Blackmagic cards for monitoring.
#/   -l             Listen to client connections and stream compressed video
#/                  through a TCP socket. Port number and video bandwidth (in
#/                  bps) are read from the 'port' and 'bandwidth' parameters of
#/                  the [tv] section of the stb-tester config file, or the
#/                  default values 4953 for port number and 1500000 bps for
#/                  bandwidth are used. Watch the stream on a remote computer
#/                  with VLC by opening 'tcp://<host>:<port>', or with
#/                  GStreamer's 'tcpclientsrc'.
#/   -v             Enable 'gst-launch' verbose output.

set -eu

script_dir="$(dirname "$0")"

usage() { grep '^#/' "$0" | cut -c4-; }
die() { echo "stbt tv: error: $*" >&2; exit 1; }

while [ $# -gt 0 ]; do
    case "$1" in
        -h|--help) usage; exit 0;;
        -f) sink="fakesink silent=true";;
        -l) gst-inspect ffenc_mpeg4 &>/dev/null ||
                die "'-l' requires gstreamer-ffmpeg package"
            port=$(stbt config tv.port 2>/dev/null || echo 4953);
            bw=$(stbt config tv.bandwidth 2>/dev/null || echo 1500000);
            sink="queue leaky=downstream ! ffenc_mpeg4 bitrate=$bw !
                  mpegtsmux ! tcpserversink port=$port"
            echo "Point vlc at: tcp://$(hostname):$port"
            ;;
        -v) v="-v";;
        -*) usage >&2; exit 1;;
        *) break;;
    esac
    shift
done

get_config () { "$script_dir/stbt-config" "$1" ; }

source_pipeline="${*:-$(get_config global.source_pipeline)}"
transformation_pipeline="$(get_config global.transformation_pipeline)"

: ${sink:=$(
        case "$(uname)" in
            (Darwin) echo "osxvideosink force-aspect-ratio=true";;
            (Linux) lspci | grep -Eq '(VMware|VirtualBox)' &&
                        echo "ximagesink force-aspect-ratio=true" || \
                        echo "xvimagesink force-aspect-ratio=true";;
            (*) echo "ximagesink force-aspect-ratio=true";;
        esac)}

set -x
eval gst-launch-1.0 ${v:-} \
    $source_pipeline \
    ! queue name=_stbt_user_data_queue max-size-buffers=0  \
        max-size-bytes=0 max-size-time=1000000000 \
    ! decodebin \
    ! queue name=_stbt_raw_frames_queue max-size-buffers=2 leaky=upstream \
    ! videoconvert \
    ! video/x-raw,format=BGR \
    ! $transformation_pipeline \
    ! videoconvert \
    ! $sink sync=false