wok diff apulse/description.txt @ rev 21671
updated pdf2djvu (0.9.4 -> 0.9.12)
author | Hans-G?nter Theisgen |
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date | Sat Jun 01 15:33:43 2019 +0100 (2019-06-01) |
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1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/apulse/description.txt Sat Jun 01 15:33:43 2019 +0100 1.3 @@ -0,0 +1,24 @@ 1.4 +The program provides an alternative partial implementation of the PulseAudio 1.5 +API. It consists of a loader script and a number of shared libraries with the 1.6 +same names as from original PulseAudio, so applications could dynamically 1.7 +load them and think they are talking to PulseAudio. Internally, no separate 1.8 +sound mixing daemon is used. Instead, apulse relies on ALSA's dmix, dsnoop, 1.9 +and plug plugins to handle multiple sound sources and capture streams running 1.10 +at the same time. dmix plugin muxes multiple playback streams; dsnoop plugin 1.11 +allow multiple applications to capture from a single microphone; and plug 1.12 +plugin transparently converts audio between various sample formats, sample 1.13 +rates and channel numbers. For more than a decade now, ALSA comes with these 1.14 +plugins enabled and configured by default. 1.15 + 1.16 +apulse wasn't designed to be a drop-in replacement of PulseAudio. It's 1.17 +pointless, since that will be just reimplementation of original PulseAudio, 1.18 +with the same client-daemon architecture, required by the complete feature 1.19 +set. Instead, only parts of the API that are crucial to specific applications 1.20 +are implemented. That's why there is a loader script, named apulse. It 1.21 +updates value of LD_LIBRARY_PATH environment variable to point also to the 1.22 +directory where apulse's libraries are installed, making them available to 1.23 +the application. 1.24 + 1.25 +Name comes from names of both ALSA and PulseAudio. As aoss was a 1.26 +compatibility layer between OSS programs and ALSA, apulse was designed to be 1.27 +compatibility layer between PulseAudio applications and ALSA.