add missing files in previous commit (ASS encoder and decoder)

Originally committed as revision 25747 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 68 insertions, 0 deletions

diff --git a/libavcodec/ass.c b/libavcodec/ass.c
new file mode 100644
index 0000000000..12aa8c7d15
--- /dev/null
+++ b/libavcodec/ass.c
@@ -0,0 +1,68 @@
+/*
+ * SSA/ASS common funtions
+ * Copyright (c) 2010  Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avcodec.h"
+#include "ass.h"
+
+void ff_ass_init(AVSubtitle *sub)
+{
+    memset(sub, 0, sizeof(*sub));
+}
+
+static int ts_to_string(char *str, int strlen, int ts)
+{
+    int h, m, s;
+    h = ts/360000;  ts -= 360000*h;
+    m = ts/  6000;  ts -=   6000*m;
+    s = ts/   100;  ts -=    100*s;
+    return snprintf(str, strlen, "%d:%02d:%02d.%02d", h, m, s, ts);
+}
+
+int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
+                    int ts_start, int ts_end, int raw)
+{
+    int len = 0, dlen, duration = ts_end - ts_start;
+    char s_start[16], s_end[16], header[48] = {0};
+    AVSubtitleRect **rects;
+
+    if (!raw) {
+        ts_to_string(s_start, sizeof(s_start), ts_start);
+        ts_to_string(s_end,   sizeof(s_end),   ts_end  );
+        len = snprintf(header, sizeof(header), "Dialogue: 0,%s,%s,",
+                       s_start, s_end);
+    }
+
+    dlen = strcspn(dialog, "\n");
+    dlen += dialog[dlen] == '\n';
+
+    rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects));
+    if (!rects)
+        return AVERROR(ENOMEM);
+    sub->rects = rects;
+    sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration);
+    rects[sub->num_rects]       = av_mallocz(sizeof(*rects[0]));
+    rects[sub->num_rects]->type = SUBTITLE_ASS;
+    rects[sub->num_rects]->ass  = av_malloc(len + dlen + 1);
+    strcpy (rects[sub->num_rects]->ass      , header);
+    strncpy(rects[sub->num_rects]->ass + len, dialog, dlen);
+    sub->num_rects++;
+    return dlen;
+}