1 files changed, 42 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/bitwriter.c b/media/libvpx/libvpx/vpx_dsp/bitwriter.c
new file mode 100644
index 0000000000..5b41aa54dd
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/bitwriter.c
@@ -0,0 +1,42 @@
+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <assert.h>
+
+#include "./bitwriter.h"
+
+#if CONFIG_BITSTREAM_DEBUG
+#include "vpx_util/vpx_debug_util.h"
+#endif
+
+void vpx_start_encode(vpx_writer *br, uint8_t *source) {
+  br->lowvalue = 0;
+  br->range = 255;
+  br->count = -24;
+  br->buffer = source;
+  br->pos = 0;
+  vpx_write_bit(br, 0);
+}
+
+void vpx_stop_encode(vpx_writer *br) {
+  int i;
+
+#if CONFIG_BITSTREAM_DEBUG
+  bitstream_queue_set_skip_write(1);
+#endif
+  for (i = 0; i < 32; i++) vpx_write_bit(br, 0);
+
+  // Ensure there's no ambigous collision with any index marker bytes
+  if ((br->buffer[br->pos - 1] & 0xe0) == 0xc0) br->buffer[br->pos++] = 0;
+
+#if CONFIG_BITSTREAM_DEBUG
+  bitstream_queue_set_skip_write(0);
+#endif
+}