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Re: Pipe som ljud-device?

On Fri, 18 Jun 2004 11:31:00 +0200, Daniel Swärd <excds@kth.se> posted to
debian-user-swedish:
 >> > Min erfarenhet är att vsound inte begriper sina egna optioner över
 >> > huvud taget. (Var detta på Woody eller är samma sak fortfarande sönder
 >> > i Sarge? Buggrapport i så fall, pronto!) Det går att hitta en
 >> > kombination som gör att den inte klagar men då gör den kanske inte
 >> > just det man ville ... Jag har tyvärr inte fört bok men i min
 >> > .bash_history hittade jag vsound -k realplay nånting.srm som kanske
 >> > kan ha funkat. (Om inte den så möjligen vsound -s men det är mindre
 >> > sannolikt.)
 >> Just det, när jag använde vsound så var jag tvungen att hacka den för
 >> att få det att funka. Buggen är rapporterad (#172552) men inte fixad,
 >> dock har någon skickat en patch.
 > Ok, så har du nåt recept på hur man får det att fungera?

Här är en något hackad version av vsound, använd den i stället. Jag
har inte hunnit gå igenom och kolla att alla fåniga problem i shell
scriptet är korrigerade (min minnesbild var att nästan inga optioner
fungerade som de skulle men nu kan jag inte reproducera ...) men om
det här hjälper så går det säkert att göra en mera formell patch och
skicka in den.

Sedan är det ju en annan fråga om det längre finns någon som sköter om
vsound-paketet och kan göra en ny patchad version, t.ex. innan Sarge
blir nästa stable. :-/

Bug #172552 korrigerar bara en av de trasiga optionerna och dessutom
en som är mindre viktig. Nu minns jag inte vad allt jag har ändrat men
det börjar vara så mycket -- och så triviala ändrigar mestadels -- att
det inte känns vettigt att göra en diff.

/* era */


#!/bin/sh
# vsound - a wrapper script that allows you to record the output of OSS programs
#
# Copyright (C) 2000,2001 Erik de Castro Lopo <erikd@zip.com.au>
# Copyright (C) 1999 James Henstridge <james@daa.com.au>
#
#   Based on the esddsp utility that is part of esound.  Esddsp's copyright:
#   Copyright (C) 1998, 1999 Manish Singh <yosh@gimp.org>
#  
# This program 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.
# 
# This program 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 this program; if not, write to the Free Software 
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

: set -vx

verbose=0
keep_temps=0
resamplerate=0
outfile=./vsound.wav
convert_to_wav=1

case $# in 0) exec "$0" -h ;; esac

while test $# -gt 0; do
    case "$1" in
	-h|--help)
	    cat <<________EOF >&2
vsound - digitally record output of an OSS audio program

vsound [options] program arguments

options:
  -f, --file=FILE    output file name
  -v, --verbose      set to verbose output
  -k, --keep-temps   don't delete temporary files
  -h, --help         this help message
  -V, --version      show program version
  -r, --resample     resample the output file to the given sample rate
                     eg. vsound -r 44100 realplay file.rm
  -d, --dspout       enable simulateous output to /dev/dsp and file
                     (may be required for some programs)
  -s, --stdout       write the intermediate (Sun AU format) file to stdout
                     (no other output file is generated)
  -n, --no-convert   do not convert the AU file to WAV
  -t, --timing       add timing delays to allow recording of streaming data

________EOF
	    exit 0
	    ;;

	-V|--version)
	    echo "vsound-0.5"
	    exit 0
	    ;;

	--file=*)
	    outfile="`echo "$1" | sed -e 's/^[^=]*=//'`"
	    shift
	    ;;

	-f|--file)
	    shift
	    if test $# -gt 0; then
		outfile="$1"
	    else
		echo "$0: No output file specified -- aborting" >&2
		exit 1
	    fi
	    shift
	    ;;
		
	-r|--resample)
	    shift
	    if test $# -gt 0; then
		resamplerate="$1"
	    else
		echo "$0: No sample rate specified -- aborting" >&2
		exit 1
	    fi
	    shift
	    ;;
		
	-d|--dspout)
	    export VSOUND_DSPOUT=1
	    shift
	    ;;

	-s|--stdout)
	    export VSOUND_STDOUT=1
	    shift
	    ;;

	-v|--verbose)
	    verbose=1
	    shift
	    ;;

	-k|--keep-temps)
	    keep_temps=1
	    shift
	    ;;

	-n|--no-convert)
	    convert_to_wav=0
	    outfile=./vsound.au
	    shift
	    ;;

	-t|--timing)
	    export VSOUND_TIMING=1
	    shift
	    ;;

	--)
	    shift
	    break
	    ;;

	-*)
	    echo "$0: unknown option $1 -- aborting" >&2
	    exit 1
	    ;;

	*)
	    break
	    ;;
    esac
done

export VSOUND_DATA=./vsound$$.au

if [ "$verbose" = 1 ] && [ "$VSOUND_STDOUT" = 1 ]; then
    echo "$0: Error: cannot specify both --verbose and --stdout." >&2
    exit 1
fi


if [ "$verbose" = 1 ]; then
    echo "Output file:   $outfile" >&2
    echo "Temp AU file:  $VSOUND_DATA" >&2
fi

prefix=/usr
exec_prefix=${prefix}
pkglibdir=${exec_prefix}/lib/vsound

if [ ! "$VSOUND_STDOUT" ]; then
    cat <<-____EOF >&2
	$0: About to start the application "$@".
	The output will not be available until the application exits.
____EOF
fi

# run the program with the vsound library preloaded
if LD_PRELOAD="$pkglibdir/libvsound.so" "$@" ; then
    
    if test "$VSOUND_STDOUT" = 1; then    
        # Output went to stdout so there's no further processing to be done.
        exit 0
    fi

    if [ ! -e "$VSOUND_DATA" ]; then
	cat <<-________EOF >&2
	$0: Error: Missing file $VSOUND_DATA.
	This means that the libvsound wrapper failed to capture any sound.
	Here are some the possible reasons:
	 - You are trying to record a stream (RTSP or PNM protocol) from
	   the internet. You will need to use the --timing option.
	 - The program you are trying to run is setuid. You will need to
	   run vsound as root.
	 - The program ran, but did not produce any sound output at all.
	 - Vsound was not properly installed and hence won't work at all.
________EOF
	exit 1
    fi

    if test "$resamplerate" != 0; then
	# Use SoX to convert sample rate and file types simultaneously.
	echo -n "Resampling file to $resamplerate Hz: " >&2
	sox $VSOUND_DATA -r 44100 $outfile resample
	exitcode=$?
	echo "Done." >&2
    elif test "$convert_to_wav" = 1; then
	# Use SoX to change from AU file to WAV file.
	if test "$verbose" = 1; then
	    echo "$0: Converting to WAV file." >&2
	fi
	sox $VSOUND_DATA $outfile
	exitcode=$?
    else
	# Rename the file to remove pid portion of name.
	mv $VSOUND_DATA $outfile
	exit 0
    fi
else
    exitcode=$?
    echo "$0: application returned an error ($exitcode) -- aborting" >&2
fi

if test "$keep_temps" = 0; then
    if test "$verbose" = 1; then
	echo "Deleting temporary files." >&2
    fi
    rm -f $VSOUND_DATA
fi

exit $exitcode

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