Commit Graph

5 Commits

Author SHA1 Message Date
Stefano Pigozzi 406241005e core: move contents to mpvcore (2/2)
Followup commit. Fixes all the files references.
2013-08-06 22:52:31 +02:00
wm4 4931085a1b chmap: fix oddity due to ambiguous 6.1 ffmpeg channel layout
FFmpeg (as well as Libav) have two layouts called "6.1":
AV_CH_LAYOUT_6POINT1 and AV_CH_LAYOUT_6POINT1_BACK. We call them "6.1"
and "6.1(back)". Change the default layout for 7 channels as well to
return the same layout as av_get_default_channel_layout(). (Looks a bit
questionable, but for now it's better to follow FFmpeg.)
2013-05-13 23:55:39 +02:00
wm4 a39d369c25 audio: fix ALSA 4 channel surround output
It turns out that ALSA's 4 channel layout is different from mpv's and
ffmpeg's 4.0 layout. Thus trying to do 4 channel output led to incorrect
remixing via lib{av,sw}resample.

Fix the default layouts for the internal filter chain as well, although
I'm not sure if it matters at all.
2013-05-13 18:27:09 +02:00
wm4 ab8f28a672 audio: add channel map selection function
The point is selecting a minimal fallback. The AOs will call this
through the AO API, so it will be possible to add options affecting
the general channel layout selection.

It provides the following mechanism to AOs:
- forcing the correct channel order
- downmixing to stereo if no layout is available
- allow 5.1 <-> 5.1(side) fallback
- handling "unknown" channel layouts

This is quite weak and lots of code/complexity for little gain. All AOs
already made sure the channel order was correct, and the fallback is of
little value, and could perhaps be done in the frontend instead, like
stereo downmixing with --channels=2 is handled. But I'm not really sure
how this stuff should _really_ work, and the new code will hopefully
provides enough flexibility to make radical changes to channel layout
negotiation easier.
2013-05-12 21:24:57 +02:00
wm4 0042735d7a audio: add channel map API
Unused, will be used in the following commits.

Let chmap.h define the number of maximum channels, because that is most
convenient.
2013-05-12 21:24:54 +02:00