[pulseaudio-discuss] [PATCH v2 4/5] alsa-mixer: Add "default-volume" path option

[David Henningsson]

On 2015-04-17 22:26, Tanu Kaskinen wrote:
> This allows customizing the default volume on a per-path basis.
>
> The default volume for analog outputs is set to 30%, because that's
> less likely to be too loud than the "default default" volume, which
> is 100%. Digital outputs typically have another volume control down
> the line, so for those it makes sense to keep the default at 100%.

Gmane is down, so I can't verify that I said the same the last time, but 
anyhow :-)

Without having looked through the implementation details in the earlier 
patches, I think it's probably a good idea to have default volumes per 
port, but I don't want a default in analog-output.conf.common, because 
at least line outs should also be 100% by default.



> ---
>   src/modules/alsa/alsa-mixer.c                          | 4 ++++
>   src/modules/alsa/alsa-mixer.h                          | 1 +
>   src/modules/alsa/mixer/paths/analog-output.conf.common | 7 +++++++
>   3 files changed, 12 insertions(+)
>
> diff --git a/src/modules/alsa/alsa-mixer.c b/src/modules/alsa/alsa-mixer.c
> index 2314612..e921f8b 100644
> --- a/src/modules/alsa/alsa-mixer.c
> +++ b/src/modules/alsa/alsa-mixer.c
> @@ -2438,6 +2438,7 @@ pa_alsa_path* pa_alsa_path_new(const char *paths_dir, const char *fname, pa_alsa
>           { "description",         pa_config_parse_string,            NULL, "General" },
>           { "mute-during-activation", pa_config_parse_bool,           NULL, "General" },
>           { "eld-device",          pa_config_parse_int,               NULL, "General" },
> +        { "default-volume",      pa_config_parse_volume,            NULL, "General" },
>
>           /* [Option ...] */
>           { "priority",            option_parse_priority,             NULL, NULL },
> @@ -2471,12 +2472,14 @@ pa_alsa_path* pa_alsa_path_new(const char *paths_dir, const char *fname, pa_alsa
>       p->proplist = pa_proplist_new();
>       p->direction = direction;
>       p->eld_device = -1;
> +    p->default_volume = PA_VOLUME_NORM;
>
>       items[0].data = &p->priority;
>       items[1].data = &p->description_key;
>       items[2].data = &p->description;
>       items[3].data = &mute_during_activation;
>       items[4].data = &p->eld_device;
> +    items[5].data = &p->default_volume;
>
>       if (!paths_dir)
>           paths_dir = get_default_paths_dir();
> @@ -4647,6 +4650,7 @@ static pa_device_port* device_port_alsa_init(pa_hashmap *ports, /* card ports */
>           pa_device_port_new_data_set_name(&port_data, name);
>           pa_device_port_new_data_set_description(&port_data, description);
>           pa_device_port_new_data_set_direction(&port_data, path->direction == PA_ALSA_DIRECTION_OUTPUT ? PA_DIRECTION_OUTPUT : PA_DIRECTION_INPUT);
> +        pa_device_port_new_data_set_default_volume(&port_data, path->default_volume);
>
>           p = pa_device_port_new(core, &port_data, sizeof(pa_alsa_port_data));
>           pa_device_port_new_data_done(&port_data);
> diff --git a/src/modules/alsa/alsa-mixer.h b/src/modules/alsa/alsa-mixer.h
> index ec39fab..1141f61 100644
> --- a/src/modules/alsa/alsa-mixer.h
> +++ b/src/modules/alsa/alsa-mixer.h
> @@ -182,6 +182,7 @@ struct pa_alsa_path {
>       char *description;
>       unsigned priority;
>       int eld_device;
> +    pa_volume_t default_volume;
>       pa_proplist *proplist;
>
>       bool probed:1;
> diff --git a/src/modules/alsa/mixer/paths/analog-output.conf.common b/src/modules/alsa/mixer/paths/analog-output.conf.common
> index 17b4527..e461a53 100644
> --- a/src/modules/alsa/mixer/paths/analog-output.conf.common
> +++ b/src/modules/alsa/mixer/paths/analog-output.conf.common
> @@ -66,6 +66,10 @@
>   ;                                        # cases this can increase such noises. Default: no.
>   ; eld-device = ...                       # If this is an HDMI port, here's where to specify the device number for the ELD mixer
>   ;                                        # control. The default is to not make use of ELD information.
> +; default-volume = ...                   # The default volume for cases where no other source of good default volume is
> +;                                        # available. Sources of good default volume include policy modules and the current
> +;                                        # hardware volume, so if the path has hardware volume control available, then this
> +;                                        # option doesn't have effect. The volume is given as a percentage, e.g. "30%".
>   ;
>   ; [Properties]                           # Property list for this path. The list is merged into the port property list.
>   ; <key> = <value>                        # Each property is defined on its own line.
> @@ -123,6 +127,9 @@
>   ; state.plugged = yes | no | unknown   # Normally a plugged jack would mean the port becomes available, and an unplugged means it's
>   ; state.unplugged = yes | no | unknown # unavailable, but the port status can be overridden by specifying state.plugged and/or state.unplugged.
>
> +[General]
> +default-volume = 30%
> +
>   [Element PCM]
>   switch = mute
>   volume = merge
>

-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic