[AT3P] Introduce at3p development branch

- Simpe code just to produce correct at3p zero frame

1 files changed, 61 insertions, 0 deletions

diff --git a/src/atrac/at3p/at3p_bitstream.cpp b/src/atrac/at3p/at3p_bitstream.cpp
new file mode 100644
index 0000000..7bf5829
--- /dev/null
+++ b/src/atrac/at3p/at3p_bitstream.cpp
@@ -0,0 +1,61 @@
+/*
+ * This file is part of AtracDEnc.
+ *
+ * AtracDEnc 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.
+ *
+ * AtracDEnc 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 AtracDEnc; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#include "at3p_bitstream.h"
+#include <lib/bitstream/bitstream.h>
+#include <env.h>
+#include <iostream>
+
+namespace NAtracDEnc {
+
+TAt3PBitStream::TAt3PBitStream(ICompressedOutput* container, uint16_t frameSz)
+    : Container(container)
+    , FrameSz(frameSz)
+{
+    NEnv::SetRoundFloat();
+}
+
+void TAt3PBitStream::WriteFrame(int channels)
+{
+    NBitStream::TBitStream bitStream;
+    // First bit must be zero
+    bitStream.Write(0, 1);
+    // Channel block type
+    // 0 - MONO block
+    // 1 - STEREO block
+    // 2 - Nobody know
+    bitStream.Write(channels - 1, 2);
+
+    // Skip some bits to produce correct zero bitstream
+    bitStream.Write(0, 10);
+    if (channels == 2) {
+        bitStream.Write(0, 14);
+    } else {
+        bitStream.Write(0, 5);
+    }
+    // Terminator
+    bitStream.Write(3, 2);
+
+    std::vector<char> buf = bitStream.GetBytes();
+
+    buf.resize(FrameSz);
+    Container->WriteFrame(buf);
+}
+
+}