[FFmpeg-devel] [PATCH] set FONTCONFIG_PATH relative to ffmpeg binary, if it is a static build

[Helmut K. C. Tessarek]

For static builds FONTCONFIG might not be installed on the system, so ffmpeg will throw an error.
Also, if people bundled the binary, a relative fontconfig path would be an advantage.
---
 ffmpeg.c | 31 +++++++++++++++++++++++++++++++
 ffmpeg.h |  1 +
 2 files changed, 32 insertions(+)

diff --git a/ffmpeg.c b/ffmpeg.c
index 6a51810..d8f9443 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -3541,11 +3541,42 @@ static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
 {
 }
 
+void set_relative_fontconfig_path(void)
+{
+#if !HAVE_WINDOWS_H
+	char subdir[] = "/fonts";
+#else
+	char subdir[] = "\\fonts";
+#endif
+
+	char *curdir = (char *) av_malloc (PATH_MAX);
+	char *fontdir = (char *) av_malloc (PATH_MAX);
+
+	getcwd (curdir, PATH_MAX);
+
+	strncpy( fontdir, curdir, PATH_MAX );
+	fontdir[PATH_MAX-1] = '\0';
+
+	if( strlen(curdir) < (PATH_MAX - 7) )
+	{
+		strncat( fontdir, subdir, 7 );
+	}
+
+	setenv( "FONTCONFIG_PATH", fontdir, 0 );
+
+	av_free( fontdir );
+	av_free( curdir );
+}
+
 int main(int argc, char **argv)
 {
     int ret;
     int64_t ti;
 
+#if CONFIG_STATIC && CONFIG_FONTCONFIG
+    set_relative_fontconfig_path();
+#endif
+
     register_exit(ffmpeg_cleanup);
 
     setvbuf(stderr,NULL,_IONBF,0); /* win32 runtime needs this */
diff --git a/ffmpeg.h b/ffmpeg.h
index 00f7a2a..48c6451 100644
--- a/ffmpeg.h
+++ b/ffmpeg.h
@@ -489,6 +489,7 @@ int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOu
 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
 
+void set_relative_fontconfig_path(void);
 int ffmpeg_parse_options(int argc, char **argv);
 
 int vdpau_init(AVCodecContext *s);
-- 
1.8.5.4