Adding upstream version 2:20.4+dfsg.upstream/2%20.4+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/xbmc/utils/BitstreamReader.h b/xbmc/utils/BitstreamReader.h
new file mode 100644
index 0000000..89fa2b2
--- /dev/null
+++ b/xbmc/utils/BitstreamReader.h
@@ -0,0 +1,49 @@
+/*
+ *  Copyright (C) 2017-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+class CBitstreamReader
+{
+public:
+  CBitstreamReader(const uint8_t *buf, int len);
+  uint32_t   ReadBits(int nbits);
+  void       SkipBits(int nbits);
+  uint32_t   GetBits(int nbits);
+
+private:
+  const uint8_t *buffer, *start;
+  int      offbits, length, oflow;
+};
+
+const uint8_t* find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
+
+////////////////////////////////////////////////////////////////////////////////////////////
+//! @todo refactor this so as not to need these ffmpeg routines.
+//! These are not exposed in ffmpeg's API so we dupe them here.
+
+/*
+ *  AVC helper functions for muxers
+ *  Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@smartjog.com>
+ *  This is part of FFmpeg
+ *  
+ *  SPDX-License-Identifier: LGPL-2.1-or-later
+ *  See LICENSES/README.md for more information.
+ */
+constexpr uint32_t BS_RB24(const uint8_t* x)
+{
+  return (x[0] << 16) | (x[1] << 8) | x[2];
+}
+
+constexpr uint32_t BS_RB32(const uint8_t* x)
+{
+  return (x[1] << 24) | (x[1] << 16) | (x[2] << 8) | x[3];
+}
+