VP3 & Theora parser to extract keyframe flags.

This parser is not able to split random bitstream pieces.

Originally committed as revision 13986 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 43 insertions, 0 deletions

diff --git a/libavcodec/vp3_parser.c b/libavcodec/vp3_parser.c
new file mode 100644
index 0000000000..818b460ffc
--- /dev/null
+++ b/libavcodec/vp3_parser.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2008 Michael Niedermayer
+ *
+ * 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 "parser.h"
+
+static int parse(AVCodecParserContext *s,
+                           AVCodecContext *avctx,
+                           const uint8_t **poutbuf, int *poutbuf_size,
+                           const uint8_t *buf, int buf_size)
+{
+    if(avctx->codec_id == CODEC_ID_THEORA)
+        s->pict_type= (buf[0]&0x40) ? FF_P_TYPE : FF_I_TYPE;
+    else
+        s->pict_type= (buf[0]&0x80) ? FF_P_TYPE : FF_I_TYPE;
+
+    *poutbuf = buf;
+    *poutbuf_size = buf_size;
+    return buf_size;
+}
+
+AVCodecParser vp3_parser = {
+    { CODEC_ID_THEORA, CODEC_ID_VP3 },
+    0,
+    NULL,
+    parse,
+};