This is a bit weird: m_option_string types (i.e. char*) can be NULL. But
they're supposed to be treated just like empty strings. So don't make
the m_option_type.print function return NULL for these values. Returning
NULL would mean failure.
This didn't matter much before, but was quite visible through the client
API.
m_option is basically the mechanism to handle C data types in a dynamic
way. Add functions to convert values to and from mpv_node. For example,
string lists are turned into mpv_node using MPV_FORMAT_NODE_ARRAY, and
so on.
Doesn't require other code to care about this, which will allow us to
simplify the property code.
Only "wildcard" options like "vf" and string lists used this, and
m_option_list_findb() (which is excused).
M_OPT_PARSE_ESCAPES was pretty stupid, and broke the (useful) assumption
that string variables contain exactly the same value as set by the
option. Simplify it, and move escape handling to the place where it's
used.
Escape handling itself is not terribly useful, but still allows useful
things like multiline custom OSD with "\n".
Try to make it more intuitive by not requiring hex values. The new way
uses float values in the range 0.0-1.0, separated by '/' (':' was
suggested, but that wouldn't allow color options in sub-options).
Example: --osd-color=1.0/0.0/0.0/0.75
Using the range 0.0-1.0 has the advantage that it could be easily
extended to colors beyond 8 bit.
Details see manpage.
Suggestions for alternative syntax or value ranges are welcome, but be
quick with it.
This code is shared between input.conf parser and option parser. Until
now, the performance didn't really matter. But I want to use this code
for JSON parsing too, and since JSON will have to be parsed a lot, it
should probably try to avoid realloc'ing too much.
This commit moves parsing of C-style escaped strings into a common
function, and allows using it in a way realloc can be completely
avoided, if the already allocated buffer is large enough.
Make it so --msglevel extends previous --msglevel uses, instead of
overwriting them. Do this by literally appending the --msglevel option
value to the previous one.
Always pass around mp_log contexts in the option parser code. This of
course affects all users of this API as well.
In stream.c, pass a mp_null_log, because we can't do it properly yet.
This will be fixed later.
Basically, reimplement --msglevel. Instead of making the new msg code
use the legacy code, make the legacy code use the reimplemented
functionality.
The handling of the deprecated --identify switch changes. It temporarily
stops working; this will be fixed in later commits.
The actual sub-options syntax (like --msglevel-vo=...) goes away, but I
bet nobody knew about this or used this anyway.
Since m_option.h and options.h are extremely often included, a lot of
files have to be changed.
Moving path.c/h to options/ is a bit questionable, but since this is
mainly about access to config files (which are also handled in
options/), it's probably ok.
wm4