G.729 decoder main code

(just skeleton, contains only parts, explicitly ok'ed by Michael)

Originally committed as revision 14800 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 52 insertions, 0 deletions

diff --git a/libavcodec/g729.h b/libavcodec/g729.h
new file mode 100644
index 0000000000..820221299e
--- /dev/null
+++ b/libavcodec/g729.h
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+/*
+ * G.729 decoder
+ * Copyright (c) 2008 Vladimir Voroshilov
+ *
+ * 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
+ */
+#ifndef FFMPEG_G729_H
+#define FFMPEG_G729_H
+
+#include <stdint.h>
+
+/// Moving Average (MA) prediction order
+#define MA_NP                      4
+
+/**
+ * minimum quantized LSF value (3.2.4)
+ * 0.005 in Q13
+ */
+#define LSFQ_MIN                   40
+
+/**
+ * maximum quantized LSF value (3.2.4)
+ * 3.135 in Q13
+ */
+#define LSFQ_MAX                   25681
+
+/**
+ * minimum LSF distance (3.2.4)
+ * 0.0391 in Q13
+ */
+#define LSFQ_DIFF_MIN              321
+
+/**
+ * maximum possible subframe size
+ */
+#define MAX_SUBFRAME_SIZE 44
+
+#endif // FFMPEG_G729_H