[pulseaudio-discuss] [PATCH 0/4] Volume ramping

Jaska Uimonen jaska.uimonen at helsinki.fi
Wed Aug 8 01:14:36 PDT 2012

From: Jaska Uimonen <jaska.uimonen at helsinki.fi>

This is my 5 cents to the volume ramping ideas/discussion
that has been going on in various forums. I just wanted to
publish it for comments etc. Maybe someone can even use

I decided to do add another software volume to sink and
sink-input which is independent of the other volumes.
I know that's not nice but it was really hard for me to
try adding the ramping to the existing volume functionality.
It would be nice if the ramping would in the end change
the actual volume, but I also see some drawbacks with that.

This kind of ramping is good for "transient" type ramps.
I mean it is good for ramping up and down your stream or
temporarily lowering and raising the volume of your stream.
It is not that good for permanently changing your volume.
Not because it would take more resources, but because of
it is "hidden" sw volume.

Jaska Uimonen (4):
  volume ramp: additions to the low level infra
  volume ramp: adding volume ramping to sink-input
  volume ramp: add volume ramping to sink
  volume ramp: add client api support for volume ramping

 src/map-file                    |    3 +
 src/pulse/def.h                 |   22 ++++-
 src/pulse/introspect.c          |   83 ++++++++++++++++
 src/pulse/introspect.h          |    9 ++
 src/pulse/stream.c              |    5 +-
 src/pulsecore/native-common.h   |    3 +
 src/pulsecore/pdispatch.c       |    2 +
 src/pulsecore/protocol-native.c |   88 +++++++++++++++++-
 src/pulsecore/sample-util.c     |  201 +++++++++++++++++++++++++++++++++++++++
 src/pulsecore/sample-util.h     |   17 ++++
 src/pulsecore/sink-input.c      |   87 +++++++++++++++++
 src/pulsecore/sink-input.h      |   11 ++-
 src/pulsecore/sink.c            |  109 +++++++++++++++++++--
 src/pulsecore/sink.h            |    8 ++
 14 files changed, 634 insertions(+), 14 deletions(-)


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