VapourSynth: introduce build time configurable for the default value …

…of cachedir

Signed-off-by: akarin <i@akarin.info>

VapourSynth/README

@@ -120,7 +120,7 @@
             LWLibavSource(string source, int stream_index = -1, int threads = 0, int cache = 1, string cachefile = source + ".lwi",
                           int seek_mode = 0, int seek_threshold = 10, int dr = 0, int fpsnum = 0, int fpsden = 1, 
                           int variable = 0, string format = "", int repeat = 1, int dominance = 0, string decoder = "", int prefer_hw = 0, int ff_loglevel = 0,
-                          string cachedir = ".")
+                          string cachedir = DEFAULT_CACHEDIR)
                 * This function uses libavcodec as video decoder and libavformat as demuxer.
             [Arguments]
                 + source
@@ -168,5 +168,5 @@
                     Same as 'prefer_hw' of LibavSMASHSource().
                 + ff_loglevel (default : 0)
                     Same as 'ff_loglevel' of LibavSMASHSource().
-                + cachedir (default : ".")
-                    Create *.lwi file under this directory with names encoding the full path to avoid collisions. Set to "" to restore the previous behavior.
+                + cachedir (default : DEFAULT_CACHEDIR)
+                    Create *.lwi file under this directory with names encoding the full path to avoid collisions. Set to "" to restore the previous behavior (storing *.lwi along side the source video file).

VapourSynth/lwlibav_source.c

@@ -332,7 +332,7 @@ void VS_CC vs_lwlibavsource_create( const VSMap *in, VSMap *out, void *user_data
     set_option_string( &index_file_path,         NULL, "cachefile",      in, vsapi );
     set_option_string( &format,                  NULL, "format",         in, vsapi );
     set_option_string( &preferred_decoder_names, NULL, "decoder",        in, vsapi );
-    set_option_string( &cache_dir,               ".",  "cachedir",       in, vsapi );
+    set_option_string( &cache_dir,               DEFAULT_CACHEDIR,  "cachedir",       in, vsapi );
     set_preferred_decoder_names_on_buf( hp->preferred_decoder_names_buf, preferred_decoder_names );
     /* Set options. */
     lwlibav_option_t opt;

VapourSynth/meson.build

@@ -3,7 +3,7 @@ project('L-SMASH-Works', 'c',
   meson_version: '>=0.48.0'
 )
 
-add_project_arguments('-DXXH_INLINE_ALL', '-D_FILE_OFFSET_BITS=64', language: 'c')
+add_project_arguments('-DXXH_INLINE_ALL', '-D_FILE_OFFSET_BITS=64', '-DDEFAULT_CACHEDIR=' + get_option('cachedir'), language: 'c')
 
 sources = [
   'libavsmash_source.c',

VapourSynth/meson_options.txt

@@ -0,0 +1,7 @@
+# -Dcachedir=val set the default value for the cachedir option. Examples:
+# (1) "": store *.lwi along side the source video file (the previous behavior)
+# (2) ".": store *.lwi at the current directory
+# (3) "/tmp": store *.lwi at /tmp
+# (4) getenv("TMPDIR") [Unix] or getenv("TEMP") [Windows]: store *.lwi at system temporary directory.
+# If unspecified, the default value is "".
+option('cachedir', type: 'string', value: '""', description: 'Default value for cachedir parameter, e.g. "" to store along side the source video file; "." to store at current working directory and getenv("TMPDIR") to use temporary directory')