Software volume control

[foobum@…]

This patch allows the internal volume controls to work when audio is output via a digital device (including 'passthru' and upmixed AC-3). Depends on #5900.

Turning on internal volume controls whilst leaving the mixer device as a hardware device will give you software control over the volume of 'passthru' AC-3. Also setting the mixer device to "software" gives you software volume control of all audio.

Includes a crude attempt at normalising the volume of PCM from video, PCM from mythmusic and 'passthru' AC-3. There's a small delay between user input and change in volume due to buffering.

[anonymous]

I had to add #include <limits> to have it compiled using fixes-19961

[anonymous]

I had to add #include <limits> to have it compiled using fixes-19961 in mythtv/libs/libmyth/audiooutputbase.cpp

[anonymous]

Confirmed: Works perfect with fixes-19961 with audio via HDMI interface using Mixer "software".

[Markus Schulz <msc@…>]

wow, many thanks. works fine after my first tests. really really nice, now i can control everything with only one remote...

[Andreas <miscdreas@…>]

Works with -fixes svn 20023. I am particularly happy about the working dts passthru. It would be nice to see the patches being committed.

[stuartm]

Please can we keep discussion and 'me too' posts out of the ticket system.

[Markus Schulz <msc@…>]

small Problem, after seeking thru commercials with different audio track (5.1 -> 2.0) the volume would be reset to the default value. And in general the changed volume would'nt be saved after exit from the player.

[Markus Schulz <msc@…>]

another problem, DTS audio don't work anymore (don't know if #5900 or #6279 was the real problem). i would expect (cause of softmixing) a DTS decode with AC3 encode, but no audio was the result. Disable upmixer won't help too.

[foobum@…]

Both problems should be fixed..

[foobum@…]

New patches fix volume set to zero when skipping over stream change.

[Markus Schulz <msc@…>]

Disable upmixer should disable Software Mixer too...

[foobum@…]

Don't think it should - I want software control of stereo (which, for me, is sent out a digital device) too.

[foobum@…]

New patches fix DTS channel order.

[Markus Schulz <msc@…>]

But if i remember right, if the channel/recording/video only provides AC3/DTS audio and i disable the upmixer the result was buggy. I will check this again and produce some logs.

[Matthew Wire <devel@…>]

I get the following compile error with latest trunk:

audiooutputbase.cpp: In member function ‘void AudioOutputBase::_AdjustVolume(AudioDataType*, int, bool)’:
audiooutputbase.cpp:654: error: ‘numeric_limits’ was not declared in this scope
audiooutputbase.cpp:654: error: expected primary-expression before ‘>’ token
audiooutputbase.cpp:654: error: no matching function for call to ‘max()’
audiooutputbase.cpp:656: error: expected primary-expression before ‘>’ token
audiooutputbase.cpp:656: error: no matching function for call to ‘max()’
audiooutputbase.cpp:658: error: expected primary-expression before ‘>’ token
audiooutputbase.cpp:658: error: no matching function for call to ‘min()’
audiooutputbase.cpp:661: error: expected primary-expression before ‘>’ token
audiooutputbase.cpp:661: error: no matching function for call to ‘max()’

[jyavenard@…]

Need to add: #include <limits>

to mythtv/libs/libmyth/audiooutputbase.cpp

[foobum@…]

against r20844

[foobum@…]

against r20844

[foobum@…]

New patches against r20844 and audioencoding-*-7.patch on #5900.

[mythtv@…]

When mixer control is set to master, volume is reset every time audio output is initialized.

This patch needs to be applied on top of softvol-trunk-5.patch

diff --git a/mythtv/libs/libmyth/audiooutputbase.cpp b/mythtv/libs/libmyth/audiooutputbase.cpp
index cf2fc42..c3e0fbf 100644
--- a/mythtv/libs/libmyth/audiooutputbase.cpp
+++ b/mythtv/libs/libmyth/audiooutputbase.cpp
@@ -341,7 +341,11 @@ void AudioOutputBase::Reconfigure(const AudioSettings &orig_settings)
 
     // Only used for software volume
     if (set_initial_vol && internal_vol)
-        volume = gContext->GetNumSetting("PCMMixerVolume", 80);
+    {
+        QString controlLabel = gContext->GetSetting("MixerControl", "PCM");
+        controlLabel += "MixerVolume";
+        volume = gContext->GetNumSetting(controlLabel, 80);
+    }
 
     SyncVolume();
 

Works great otherwise (as of r21298 in trunk). Great job and thanks a lot for contributing.

[JYA]

sofvol-trunk-6.patch

Patches against trunk r21594 and audioencoding-trunk-7.4.patch.

[JYA]

Against trunk r21594

[JYA]

See #6975