add SubRip decoder

Originally committed as revision 26119 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 45 insertions, 0 deletions

diff --git a/libavcodec/ass.h b/libavcodec/ass.h
index 1c847f1..e04b4cc 100644
--- a/libavcodec/ass.h
+++ b/libavcodec/ass.h
@@ -25,6 +25,51 @@
 #include "avcodec.h"
 
 /**
+ * Default values for ASS style.
+ * @defgroup ass_default
+ * @{
+ */
+#define ASS_DEFAULT_FONT        "Arial"
+#define ASS_DEFAULT_FONT_SIZE   16
+#define ASS_DEFAULT_COLOR       0xffffff
+#define ASS_DEFAULT_BACK_COLOR  0
+#define ASS_DEFAULT_BOLD        0
+#define ASS_DEFAULT_ITALIC      0
+#define ASS_DEFAULT_UNDERLINE   0
+#define ASS_DEFAULT_ALIGNMENT   2
+/** @} */
+
+/**
+ * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS.
+ *
+ * @param avctx pointer to the AVCodecContext
+ * @param font name of the default font face to use
+ * @param font_size default font size to use
+ * @param color default text color to use (ABGR)
+ * @param back_color default background color to use (ABGR)
+ * @param bold 1 for bold text, 0 for normal text
+ * @param italic 1 for italic text, 0 for normal text
+ * @param underline 1 for underline text, 0 for normal text
+ * @param alignment position of the text (left, center, top...), defined after
+ *                  the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top)
+ * @return >= 0 on success otherwise an error code <0
+ */
+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);
+
+/**
+ * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS
+ * with default style.
+ *
+ * @param avctx pointer to the AVCodecContext
+ * @return >= 0 on success otherwise an error code <0
+ */
+int ff_ass_subtitle_header_default(AVCodecContext *avctx);
+
+/**
  * Initialize an AVSubtitle structure for use with ff_ass_add_rect().
  *
  * @param sub pointer to the AVSubtitle