diff ffmpeg/libavcodec/ass.c @ 10:6840f77b83aa

commit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavcodec/ass.c	Sun Apr 21 10:55:35 2013 +0200
@@ -0,0 +1,132 @@
+/*
+ * SSA/ASS common functions
+ * Copyright (c) 2010  Aurelien Jacobs <[e-mail]>
+ *
+ * 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"
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/bprint.h"
+#include "libavutil/common.h"
+
+int ff_ass_subtitle_header(AVCodecContext *avctx,
+                           const char *font, int font_size,
+                           int color, int back_color,
+                           int bold, int italic, int underline,
+                           int alignment)
+{
+    avctx->subtitle_header = av_asprintf(
+             "[Script Info]\r\n"
+             "ScriptType: v4.00+\r\n"
+             "\r\n"
+             "[V4+ Styles]\r\n"
+             "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n"
+             "Style: Default,%s,%d,&H%x,&H%x,&H%x,&H%x,%d,%d,%d,1,1,0,%d,10,10,10,0,0\r\n"
+             "\r\n"
+             "[Events]\r\n"
+             "Format: Layer, Start, End, Style, Text\r\n",
+             font, font_size, color, color, back_color, back_color,
+             -bold, -italic, -underline, alignment);
+
+    if (!avctx->subtitle_header)
+        return AVERROR(ENOMEM);
+    avctx->subtitle_header_size = strlen(avctx->subtitle_header);
+    return 0;
+}
+
+int ff_ass_subtitle_header_default(AVCodecContext *avctx)
+{
+    return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT,
+                                         ASS_DEFAULT_FONT_SIZE,
+                                         ASS_DEFAULT_COLOR,
+                                         ASS_DEFAULT_BACK_COLOR,
+                                         ASS_DEFAULT_BOLD,
+                                         ASS_DEFAULT_ITALIC,
+                                         ASS_DEFAULT_UNDERLINE,
+                                         ASS_DEFAULT_ALIGNMENT);
+}
+
+static void insert_ts(AVBPrint *buf, int ts)
+{
+    if (ts == -1) {
+        av_bprintf(buf, "9:59:59.99,");
+    } else {
+        int h, m, s;
+
+        h = ts/360000;  ts -= 360000*h;
+        m = ts/  6000;  ts -=   6000*m;
+        s = ts/   100;  ts -=    100*s;
+        av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
+    }
+}
+
+int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
+                    int ts_start, int duration, int raw)
+{
+    AVBPrint buf;
+    int ret, dlen;
+    AVSubtitleRect **rects;
+
+    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
+    if (!raw || raw == 2) {
+        long int layer = 0;
+
+        if (raw == 2) {
+            /* skip ReadOrder */
+            dialog = strchr(dialog, ',');
+            if (!dialog)
+                return AVERROR_INVALIDDATA;
+            dialog++;
+
+            /* extract Layer or Marked */
+            layer = strtol(dialog, (char**)&dialog, 10);
+            if (*dialog != ',')
+                return AVERROR_INVALIDDATA;
+            dialog++;
+        }
+        av_bprintf(&buf, "Dialogue: %ld,", layer);
+        insert_ts(&buf, ts_start);
+        insert_ts(&buf, duration == -1 ? -1 : ts_start + duration);
+        if (raw != 2)
+            av_bprintf(&buf, "Default,");
+    }
+
+    dlen = strcspn(dialog, "\n");
+    dlen += dialog[dlen] == '\n';
+
+    av_bprintf(&buf, "%.*s", dlen, dialog);
+    if (raw == 2)
+        av_bprintf(&buf, "\r\n");
+    if (!av_bprint_is_complete(&buf))
+        return AVERROR(ENOMEM);
+
+    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;
+    ret = av_bprint_finalize(&buf, &rects[sub->num_rects]->ass);
+    if (ret < 0)
+        return ret;
+    sub->num_rects++;
+    return dlen;
+}