1 files changed, 70 insertions, 0 deletions
diff --git a/libavcodec/vp9_parser.c b/libavcodec/vp9_parser.c
new file mode 100644
index 0000000..c957a75
--- /dev/null
+++ b/libavcodec/vp9_parser.c
@@ -0,0 +1,70 @@
+/*
+ * VP9 compatible video decoder
+ *
+ * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
+ * Copyright (C) 2013 Clément Bœsch <u pkh me>
+ *
+ * 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 "libavutil/intreadwrite.h"
+#include "libavcodec/get_bits.h"
+#include "parser.h"
+
+static int parse(AVCodecParserContext *ctx,
+                 AVCodecContext *avctx,
+                 const uint8_t **out_data, int *out_size,
+                 const uint8_t *data, int size)
+{
+    GetBitContext gb;
+    int res, profile, keyframe;
+
+    *out_data = data;
+    *out_size = size;
+
+    if (!size || (res = init_get_bits8(&gb, data, size)) < 0)
+        return size; // parsers can't return errors
+    get_bits(&gb, 2); // frame marker
+    profile  = get_bits1(&gb);
+    profile |= get_bits1(&gb) << 1;
+    if (profile == 3) profile += get_bits1(&gb);
+    if (profile > 3)
+        return size;
+
+    avctx->profile = profile;
+
+    if (get_bits1(&gb)) {
+        keyframe = 0;
+    } else {
+        keyframe  = !get_bits1(&gb);
+    }
+
+    if (!keyframe) {
+        ctx->pict_type = AV_PICTURE_TYPE_P;
+        ctx->key_frame = 0;
+    } else {
+        ctx->pict_type = AV_PICTURE_TYPE_I;
+        ctx->key_frame = 1;
+    }
+
+    return size;
+}
+
+AVCodecParser ff_vp9_parser = {
+    .codec_ids      = { AV_CODEC_ID_VP9 },
+    .parser_parse   = parse,
+};