lavc: allow subtitle text format to be ASS without timing

1 files changed, 49 insertions, 0 deletions

diff --git a/libavcodec/ass_split.c b/libavcodec/ass_split.c
index f84a686..beaba7e 100644
--- a/libavcodec/ass_split.c
+++ b/libavcodec/ass_split.c
@@ -409,6 +409,55 @@ ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf,
     return dialog;
 }
 
+void ff_ass_free_dialog(ASSDialog **dialogp)
+{
+    ASSDialog *dialog = *dialogp;
+    if (!dialog)
+        return;
+    av_freep(&dialog->style);
+    av_freep(&dialog->name);
+    av_freep(&dialog->effect);
+    av_freep(&dialog->text);
+    av_freep(dialogp);
+}
+
+ASSDialog *ff_ass_split_dialog2(ASSSplitContext *ctx, const char *buf)
+{
+    int i;
+    static const ASSFields fields[] = {
+        {"ReadOrder", ASS_INT, offsetof(ASSDialog, readorder)},
+        {"Layer",     ASS_INT, offsetof(ASSDialog, layer)    },
+        {"Style",     ASS_STR, offsetof(ASSDialog, style)    },
+        {"Name",      ASS_STR, offsetof(ASSDialog, name)     },
+        {"MarginL",   ASS_INT, offsetof(ASSDialog, margin_l) },
+        {"MarginR",   ASS_INT, offsetof(ASSDialog, margin_r) },
+        {"MarginV",   ASS_INT, offsetof(ASSDialog, margin_v) },
+        {"Effect",    ASS_STR, offsetof(ASSDialog, effect)   },
+        {"Text",      ASS_STR, offsetof(ASSDialog, text)     },
+    };
+
+    ASSDialog *dialog = av_mallocz(sizeof(*dialog));
+    if (!dialog)
+        return NULL;
+
+    for (i = 0; i < FF_ARRAY_ELEMS(fields); i++) {
+        size_t len;
+        const int last = i == FF_ARRAY_ELEMS(fields) - 1;
+        const ASSFieldType type = fields[i].type;
+        uint8_t *ptr = (uint8_t *)dialog + fields[i].offset;
+        buf = skip_space(buf);
+        len = last ? strlen(buf) : strcspn(buf, ",");
+        if (len >= INT_MAX) {
+            ff_ass_free_dialog(&dialog);
+            return NULL;
+        }
+        convert_func[type](ptr, buf, len);
+        buf += len;
+        if (*buf) buf++;
+    }
+    return dialog;
+}
+
 void ff_ass_split_free(ASSSplitContext *ctx)
 {
     if (ctx) {