Fixes several issues with header files:
- prefer alsa/asoundlib.h file for the alsa-lib core functionalities
(use #warning to inform current and future developers, do the job)
- include alsa/asoundlib.h in headers for external plugins by default
- pcm_external.h: dependencies cleanup
- as benefit, the parsers in IDEs should get all information for individial
header files (see PR#435)
This change was mainly tergetted to fix errors caused by wrong include order
(like for endianness detection, missing typedefs etc.).
Closes: https://github.com/alsa-project/alsa-lib/issues/431
Link: https://github.com/alsa-project/alsa-lib/pull/435
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This reverts partially commit b9a4997e92.
It seems that we have have some users for this very specific function.
Mark it deprecated and keep the softvol implementation separate,
so we can remove this function easily in future.
Fixes: https://github.com/alsa-project/alsa-lib/issues/186
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
