1 files changed, 72 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/bitstream.c b/media/ffvpx/libavcodec/bitstream.c
new file mode 100644
index 0000000000..3606575055
--- /dev/null
+++ b/media/ffvpx/libavcodec/bitstream.c
@@ -0,0 +1,72 @@
+/*
+ * Common bit i/o utils
+ * Copyright (c) 2000, 2001 Fabrice Bellard
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2010 Loren Merritt
+ *
+ * alternative bitstream reader & writer by Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * bitstream api.
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include "config.h"
+#include "libavutil/avassert.h"
+#include "libavutil/intreadwrite.h"
+#include "put_bits.h"
+
+void ff_put_string(PutBitContext *pb, const char *string, int terminate_string)
+{
+    while (*string) {
+        put_bits(pb, 8, *string);
+        string++;
+    }
+    if (terminate_string)
+        put_bits(pb, 8, 0);
+}
+
+void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
+{
+    int words = length >> 4;
+    int bits  = length & 15;
+    int i;
+
+    if (length == 0)
+        return;
+
+    av_assert0(length <= put_bits_left(pb));
+
+    if (CONFIG_SMALL || words < 16 || put_bits_count(pb) & 7) {
+        for (i = 0; i < words; i++)
+            put_bits(pb, 16, AV_RB16(src + 2 * i));
+    } else {
+        for (i = 0; put_bits_count(pb) & 31; i++)
+            put_bits(pb, 8, src[i]);
+        flush_put_bits(pb);
+        memcpy(put_bits_ptr(pb), src + i, 2 * words - i);
+        skip_put_bytes(pb, 2 * words - i);
+    }
+
+    put_bits(pb, bits, AV_RB16(src + 2 * words) >> (16 - bits));
+}