From 0c587a4ea8256f12735f5234e783be02532696bb Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 26 Jun 2008 11:25:42 +0000
Subject: [PATCH] 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
---
 libavcodec/Makefile     |  1 +
 libavcodec/allcodecs.c  |  1 +
 libavcodec/vp3_parser.c | 43 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 45 insertions(+)
 create mode 100644 libavcodec/vp3_parser.c

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index dedc5c2e8b..d0ea2a81b8 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -350,6 +350,7 @@ OBJS-$(CONFIG_MPEGAUDIO_PARSER)        += mpegaudio_parser.o mpegaudiodecheader.
 OBJS-$(CONFIG_MPEGVIDEO_PARSER)        += mpegvideo_parser.o mpeg12.o mpeg12data.o mpegvideo.o error_resilience.o
 OBJS-$(CONFIG_PNM_PARSER)              += pnm_parser.o pnm.o
 OBJS-$(CONFIG_VC1_PARSER)              += vc1_parser.o
+OBJS-$(CONFIG_VP3_PARSER)              += vp3_parser.o
 
 OBJS-$(CONFIG_DUMP_EXTRADATA_BSF)         += dump_extradata_bsf.o
 OBJS-$(CONFIG_H264_MP4TOANNEXB_BSF)       += h264_mp4toannexb_bsf.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 33a42426f6..d15abe89ff 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -310,6 +310,7 @@ void avcodec_register_all(void)
     REGISTER_PARSER  (MPEGVIDEO, mpegvideo);
     REGISTER_PARSER  (PNM, pnm);
     REGISTER_PARSER  (VC1, vc1);
+    REGISTER_PARSER  (VP3, vp3);
 
     /* bitstream filters */
     REGISTER_BSF     (DUMP_EXTRADATA, dump_extradata);
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,
+};