[mythtv-users] disable volume osd
Pat Pierce
raker1000 at gmail.com
Fri Nov 14 19:51:27 UTC 2008
On Fri, Nov 14, 2008 at 3:29 AM, Michael T. Dean <mtdean at thirdcontact.com>wrote:
> On 11/14/2008 01:41 AM, Nick Morrott wrote:
> > One way to accomplish this across all of MythTV is to disable "Use
> > internal volume controls" in the particular mythfrontend's
> > configuration. You can bind your VOL+/VOL- remote keys to scripts
> > which control the ALSA system/PCM volume using amixer directly.
> >
> > A script which increases the ALSA PCM volume by 5% each time it is
> > called could be:
> >
> > #!/bin/bash
> > /path/to/amixer - c 0 set PCM 5%+
> >
>
> Though an approach like this will have issues when running up against
> the limits (i.e. 0% or 100%) and can get "stuck" due to rounding error,
> depending on the card/resolution of the volume slider. I posted a
> script a while ago (
> http://www.gossamer-threads.com/lists/mythtv/users/216149#216149 ) that
> handles these and many other issues, and have improved it since (see
> attached).
>
> > The amixer manpage contains the details. These will not show anything
> > on the screen (so not trigger the OSD)
>
> The script I posted will (the current one using either mythtvosd or
> xosd's osd_cat). ;)
>
> You'll need to configure the script by editing the variable values at
> the top as described in the comments.
>
> Mike
>
> #!/bin/bash
> # volume
> #
> # Copyright 2007, Michael T. Dean (mtdean at thirdcontact dt com)
> #
> # This program is free software; you can redistribute it and/or modify it
> under
> # the terms of the GNU General Public License as published by the Free
> Software
> # Foundation; either version 2 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 General Public License for more
> # details.
> #
> # You should have received a copy of the GNU General Public License along
> with
> # this program; if not, write to the Free Software Foundation, Inc., 51
> # Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
> #
> # Description:
> # This script can be used to adjust the volume of any control provided by
> your
> # sound card and can optionally display a message using either xosd or
> # mythtvosd. The script is useful to MythTV users whose sound cards
> require
> # changing some volume control other than PCM or Master (the only two
> choices
> # MythTV supports) or who wish to modify multiple controls; or to anyone
> # wishing to add a low-dependency volume control with OSD to any system
> using,
> # for example, multimedia keys (i.e. XF86AudioRaiseVolume,
> # XF86AudioLowerVolume, XF86AudioMute) or LIRC.
> #
> # Version: 0.2
> #
> # Revision History:
> # 0.2 (20070310): complete rewrite; added support for xosd; added volume
> # control override; added mute toggle; changed script to
> use
> # control limits (rather than percents--which pose
> rounding
> # problems); each control is modified relative to current
> # value (instead of setting all to the same value);
> removed
> # usage of linefeed IFS; added error checking and
> defaults
> # for robustness; put some code in functions
> # 0.1 (20060123): initial version
> #
> # Quickstart:
> # Verify your amixer reports sane values as described in the first
> paragraph
> # of "Usage" below. Then, run the script as shown below:
> # ./volume up PCM
> # ./volume down PCM
> # ./volume mute PCM
> # ./volume unmute PCM
> # ./volume toggle PCM
> #
> # Usage:
> # volume {up|down|mute|unmute|toggle} [control1 [control2 [...]]]
> #
> # First, verify that amixer reports sane values for the control limits
> and
> # current volume. Control limits must be specified in the format "
> Limits:
> # Playback 0 - 31" in any line of output. Current volume must be
> specified
> # in the format "<anything>: Playback 28 [90%]" in any line of output.
> # Please test that your version of amixer does this for each control
> you've
> # specified in VOLUME_CONTROLS or you may blow out your speakers.
> #
> # Then, modify the default values specified below to allow usage of the
> # script in most cases without listing control names in the command line
> # (i.e. ./volume {up|down|mute|unmute|toggle}).
> #
> # To use with multimedia keys or other keyboard controls, map the
> appropriate
> # commands to the desired keys in your window manager's or some other key
> # handler's keybindings.
> #
> # To use with LIRC, you must run irexec (i.e. add the lines, "killall
> irexec"
> # and "irexec -d" (no quotes)--and in the order given)--to your X start
> # script (i.e. ~/.xinitrc). Then, add the following lines to your LIRC
> # configuration (i.e. ~/.lircrc) and adjust button names and config path
> as
> # appropriate:
> #
> # begin
> # prog = irexec
> # button = volume-up
> # config = /path/to/volume up &
> # repeat = 2
> # end
> # begin
> # prog = irexec
> # button = volume-down
> # config = /path/to/volume down &
> # repeat = 2
> # end
> # begin
> # prog = irexec
> # button = mute
> # config = /path/to/volume mute &
> # config = /path/to/volume unmute &
> # repeat = 0
> # end
> #
>
> # Modify the following default values as appropriate for your system.
>
> # Set the VOLUME_CONTROLS to the array of volume controls you want the
> script
> # to adjust. Place spaces (no commas) between elements of the array. Use
> # single quotes around elements with spaces, and optionally on elements
> without
> # spaces).
> # The list of volume controls may be overriden by specifying the names of
> # controls to modify at the end of the command-line. When overriding the
> # volume controls, each control will be adjusted by only 1 unit. See,
> also,
> # MIXER_ADJ_AMOUNT, below.
> #VOLUME_CONTROLS=('PCM' 'Surround' 'Center' 'LFE' 'Analog Front')
> #VOLUME_CONTROLS=('PCM')
> VOLUME_CONTROLS=('Master')
>
> # Set the MIXER_ADJ_AMOUNT to the array of the desired number of units by
> which
> # you want to adjust the volume of each control specified in
> VOLUME_CONTROLS.
> # You should specify the same number of adjustments as you specified
> controls
> # in VOLUME_CONTROLS.
> # The units used are specific to the sound card control. The range of
> # available values is reported by "amixer sget <control>" on the line that
> # starts with " Limits:" and may differ for the controls you've specified.
> # By choosing appropriate values, you can ensure all controls change by the
> # same relative volume.
> # If not specified, all controls will be adjusted by 1 unit.
> #MIXER_ADJ_AMOUNT=(1 1 1 1 1)
> #MIXER_ADJ_AMOUNT=(1)
>
> # Set the OSD_VOLUME_CONTROL to the name of the ALSA control whose volume
> # should be reported when using the OSD.
> # This control must be included in VOLUME_CONTROLS above or the volume will
> # always be set to the same value;
> # If not specified, the first value in VOLUME_CONTROLS will be used.
> #OSD_VOLUME_CONTROL='Center'
> #OSD_VOLUME_CONTROL='PCM'
> #OSD_VOLUME_CONTROL='Master'
>
> # Display the current volume using the specified OSD application
> (Currently,
> # only 'xosd' and 'mythtvosd' are supported). Use '' or comment out if you
> do
> # not want to display the volume
> # Note that if using mythtvosd, the volume message will only be displayed
> when
> # using Myth's internal player to play back videos. When using xosd, the
> # volume message will be displayed whether playing back videos or in the
> # frontend menus (or anywhere else in X).
> USE_OSD='xosd'
> #USE_OSD='mythtvosd'
> #USE_OSD=''
>
> # OSD application executables.
> # Provide the full path to the executable if it is not in your PATH.
> XOSD='osd_cat'
> MYTHTVOSD='mythtvosd'
>
> # Arguments to pass to xosd (do not specify -b, -P, and -T).
> # This is the location at which to specify font, position, alignment,
> offset,
> # delay, lines, shadow, and color
> XOSD_ARGS='-f -adobe-helvetica-bold-r-normal-*-*-240-100-100-p-*-iso8859-1
> -p bottom -A center -o 80 -d 1 -l 1 -s 2 -c Green'
>
> # xosd barmode to use--either percentage or slider
> XOSD_BARMODE=percentage
> #XOSD_BARMODE=slider
>
> # Set the BROADCAST_ADDRESS to the address of the frontend on which you
> want to
> # display the volume OSD when using mythtvosd.
> # Using 127.0.0.1 will generally work.
> BROADCAST_ADDRESS='127.0.0.1'
>
> # No changes should be required below this line.
>
> ACTION=$1
> shift
>
> if [ $# -gt 0 ]; then
> unset VOLUME_CONTROLS MIXER_ADJ_AMOUNT OSD_VOLUME_CONTROL
> for INDEX in `seq 0 $(($# - 1))`; do
> VOLUME_CONTROLS[${INDEX}]="$1"
> shift
> done
> fi
>
> if [ "x${OSD_VOLUME_CONTROL}" = "x" ]; then
> OSD_VOLUME_CONTROL=${VOLUME_CONTROLS[0]}
> fi
>
> NUM_CONTROLS=$((${#VOLUME_CONTROLS[*]} - 1))
>
> set_volume() {
> for INDEX in `seq 0 ${NUM_CONTROLS}`; do
> unset CONTROL RANGE VOLUME ADJUST_AMOUNT
> CONTROL=${VOLUME_CONTROLS[$INDEX]}
>
> if [ "x${CONTROL}" = "x" ]; then
> continue
> fi
>
> # Relies on amixer reporting limits in the format
> # " Limits: Playback 0 - 31" in any line of output. Please test that
> # your version of amixer does this for each control you've specified
> in
> # VOLUME_CONTROLS or you may blow out your speakers.
> RANGE=(`amixer sget "${CONTROL}" | awk '/Limits/ {split($0,a); print
> a[3] " " a[5]; exit }'`)
>
> if [ "x${RANGE[0]}" = "x" -o "x${RANGE[1]}" = "x" ]; then
> # Couldn't get the range. Skip this control
> continue
> fi
>
> # Relies on amixer reporting volume in the format
> # "<anything>: Playback 28 [90%]" in any line of output. Please test
> # that your version of amixer does this for each control you've
> specified
> # in VOLUME_CONTROLS or you may blow out your speakers.
> VOLUME=`amixer sget "${CONTROL}" | awk '/[%]/ {split($0,a,":");
> split(a[2],a); print a[2]; exit}'`
>
> if [ "x${VOLUME}" = "x" ]; then
> # Couldn't get the volume. Skip this control
> continue
> fi
>
> ADJUST_AMOUNT=${MIXER_ADJ_AMOUNT[$INDEX]}
> if [ "x${ADJUST_AMOUNT}" = "x" ]; then
> ADJUST_AMOUNT=1
> fi
> if [ "x$1" != "xup" ]; then
> ADJUST_AMOUNT=-${ADJUST_AMOUNT}
> fi
> NEW_VOLUME="$((${VOLUME} + ${ADJUST_AMOUNT}))"
> if [ ${NEW_VOLUME} -lt ${RANGE[0]} ]; then
> NEW_VOLUME=${RANGE[0]}
> elif [ ${NEW_VOLUME} -gt ${RANGE[1]} ]; then
> NEW_VOLUME=${RANGE[1]}
> fi
> amixer -q set ${CONTROL} ${NEW_VOLUME} &
> done
> }
>
> simple_message() {
> MESSAGE=$1
> if [ "x${MESSAGE}" = "x" ]; then
> return
> fi
> if [ "x${USE_OSD}" = "xxosd" ]; then
> if [ "x${XOSD}" != "x" -a "x${DISPLAY}" != "x" ]; then
> # Kill any running xosd processes (to clear the previous message)
> killall -q ${XOSD} > /dev/null 2>&1
> echo ${MESSAGE} | ${XOSD} ${XOSD_ARGS} > /dev/null 2>&1 &
> fi
> elif [ "x${USE_OSD}" = "xmythtvosd" ]; then
> if [ "x${MYTHTVOSD}" != "x" ]; then
> ${MYTHTVOSD} --bcastaddr="${BROADCAST_ADDRESS}" \
> --template='alert' \
> --alert_text="${MESSAGE}" > /dev/null 2>&1 &
> fi
> fi
> }
>
> show_percent() {
> if [ "x${USE_OSD}" = "xxosd" ]; then
> # Relies on amixer reporting volume in the format "[90%]" in any line of
> # output.
> NEW_VOLUME_PCT=`amixer sget "${OSD_VOLUME_CONTROL}" | awk '/[%]/
> {split($0,a,"["); split(a[2],a,"%"); print a[1]; exit}'`
> if [ "x${NEW_VOLUME_PCT}" = "x" ]; then
> # Couldn't get the volume. Do not display the OSD.
> return
> fi
> if [ "x${XOSD}" != "x" -a "x${DISPLAY}" != "x" ]; then
> # Kill any running xosd processes (to clear the previous message)
> killall -q ${XOSD} > /dev/null 2>&1
> ${XOSD} -b ${XOSD_BARMODE} -P ${NEW_VOLUME_PCT} \
> -T "${OSD_VOLUME_CONTROL} Volume: ${NEW_VOLUME_PCT}%"
> ${XOSD_ARGS} > /dev/null 2>&1 &
> fi
> elif [ "x${USE_OSD}" = "xmythtvosd" ]; then
> if [ "x${MYTHTVOSD}" != "x" ]; then
> ${MYTHTVOSD} --bcastaddr="${BROADCAST_ADDRESS}" \
> --template='alert' \
> --alert_text="${OSD_VOLUME_CONTROL} Volume:
> ${NEW_VOLUME_PCT}%" \
> > /dev/null 2>&1 &
> fi
> fi
> }
>
> case "${ACTION}" in
> up|down)
> set_volume "${ACTION}"
> show_percent
> ;;
> mute|unmute)
> for INDEX in `seq 0 ${NUM_CONTROLS}`; do
> unset CONTROL
> CONTROL=${VOLUME_CONTROLS[$INDEX]}
> amixer -q set ${CONTROL} ${ACTION} &
> done
> MESSAGE=`echo "${ACTION}" | tr [:lower:] [:upper:]` > /dev/null 2>&1
> simple_message ${MESSAGE}
> ;;
> toggle)
> for INDEX in `seq 0 ${NUM_CONTROLS}`; do
> unset CONTROL CURRENT_STATE
> CONTROL=${VOLUME_CONTROLS[$INDEX]}
> # Relies on amixer reporting mute state in the format
> # "<anything>[90%] [7.50dB] [on]" in any line of output. Please test
> # that your version of amixer does this for each control you've
> specified
> # in VOLUME_CONTROLS.
> CURRENT_STATE=`amixer sget "${CONTROL}" | awk '/[%]/ {split($0,a,"[");
> split(a[4],a,"]"); print a[1]; exit}'`
> if [ "x${CURRENT_STATE}" = "x" ]; then
> # Couldn't get the mute state. Skip this control.
> continue
> fi
> if [ "x${CURRENT_STATE}" = "xoff" ]; then
> MUTE=unmute
> else
> MUTE=mute
> fi
> amixer -q set ${CONTROL} ${MUTE} &
> done
> # Assume the mute state of all controls is the same as that of the
> # last successfully set control. Using toggle with multiple controls
> # in different states doesn't make much sense.
> MESSAGE=`echo "${MUTE}" | tr [:lower:] [:upper:]` > /dev/null 2>&1
> simple_message ${MESSAGE}
> ;;
> *)
> echo "Usage: $0 {up|down|mute|unmute|toggle} [control1 [control2
> [...]]]"
> exit 1
> ;;
> esac
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>
Wow, thanks, Nick, thanks Mike.
These look like what the doctor ordered. So far, I had added
a button to my frontend for a shell script to toggle the "status"
portion of the OSD, but both these look like more what I had in
mind. I had also installed xosd to give me some feedback from
the shell script, looks like that will come in more handy with Mike's
script.
Pat
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