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avfilter/vf_subtitles: allow setting fonts directory

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This is mostly useful if libass was compiled with a font provider
other than fontconfig, but is still useful in that case.

Signed-off-by: Ricardo Constantino <wiiaboo@gmail.com>
This commit is contained in:
Ricardo Constantino 2015-08-30 23:52:10 +01:00 committed by wm4
parent 642d2f9d55
commit 9dbc50b4cd
2 changed files with 8 additions and 0 deletions
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4
doc/filters.texi
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@ -9939,6 +9939,10 @@ was composed. For the syntax of this option, check the
Due to a misdesign in ASS aspect ratio arithmetic, this is necessary to
correctly scale the fonts if the aspect ratio has been changed.
@item fontsdir
Set a directory path containing fonts that can be used by the filter.
These fonts will be used in addition to whatever the font provider uses.
@item charenc
Set subtitles input character encoding. @code{subtitles} filter only. Only
useful if not UTF-8.

4
libavfilter/vf_subtitles.c
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@ -50,6 +50,7 @@ typedef struct {
ASS_Renderer *renderer;
ASS_Track *track;
char *filename;
char *fontsdir;
char *charenc;
char *force_style;
int stream_index;
@ -67,6 +68,7 @@ typedef struct {
{"filename", "set the filename of file to read", OFFSET(filename), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS }, \
{"f", "set the filename of file to read", OFFSET(filename), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS }, \
{"original_size", "set the size of the original video (used to scale fonts)", OFFSET(original_w), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS }, \
{"fontsdir", "set the directory containing the fonts to read", OFFSET(fontsdir), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS }, \
/* libass supports a log level ranging from 0 to 7 */
static const int ass_libavfilter_log_level_map[] = {
@ -106,6 +108,8 @@ static av_cold int init(AVFilterContext *ctx)
}
ass_set_message_cb(ass->library, ass_log, ctx);
ass_set_fonts_dir(ass->library, ass->fontsdir);
ass->renderer = ass_renderer_init(ass->library);
if (!ass->renderer) {
av_log(ctx, AV_LOG_ERROR, "Could not initialize libass renderer.\n");