MLP/TrueHD parser

Patch by Ian Caulfield, ian D caulfield <at> gmail D com
Thread: [PATCH] MLP/TrueHD decoder, 12 Oct 14:26

Originally committed as revision 11109 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 58 insertions, 0 deletions

diff --git a/libavcodec/mlp_parser.h b/libavcodec/mlp_parser.h
new file mode 100644
index 0000000000..3b7f43f16e
--- /dev/null
+++ b/libavcodec/mlp_parser.h
@@ -0,0 +1,58 @@
+/*
+ * MLP parser prototypes
+ * Copyright (c) 2007 Ian Caulfield
+ *
+ * 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 mlp_parser.h
+ * MLP parser prototypes
+ */
+
+#ifndef FFMPEG_MLP_PARSER_H
+#define FFMPEG_MLP_PARSER_H
+
+typedef struct MLPHeaderInfo
+{
+    int stream_type;            ///< 0xBB for MLP, 0xBA for TrueHD
+
+    int group1_bits;            ///< The bit depth of the first substream
+    int group2_bits;            ///< Bit depth of the second substream (MLP only)
+
+    int group1_samplerate;      ///< Sample rate of first substream
+    int group2_samplerate;      ///< Sample rate of second substream (MLP only)
+
+    int channels_mlp;           ///< Channel arrangement for MLP streams
+    int channels_thd_stream1;   ///< Channel arrangement for substream 1 of TrueHD streams (5.1)
+    int channels_thd_stream2;   ///< Channel arrangement for substream 2 of TrueHD streams (7.1)
+
+    int access_unit_size;       ///< Number of samples per coded frame
+    int access_unit_size_pow2;  ///< Next power of two above number of samples per frame
+
+    int is_vbr;                 ///< Stream is VBR instead of CBR
+    int peak_bitrate;           ///< Peak bitrate for VBR, actual bitrate (==peak) for CBR
+
+    int num_substreams;         ///< Number of substreams within stream
+} MLPHeaderInfo;
+
+
+int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, const uint8_t *buf,
+                           unsigned int buf_size);
+
+#endif /* FFMPEG_MLP_PARSER_H */
+