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authorAurelien Jacobs <aurel@gnuage.org>2007-05-08 23:25:31 +0000
committerAurelien Jacobs <aurel@gnuage.org>2007-05-08 23:25:31 +0000
commit99ff31dc750e8ac562b529c3ec374cfbb3e66157 (patch)
tree61c8496a4d314d0b05942559ec49400f1258d5b5 /libavcodec/ac3_parser.h
parente0fe500f01ebd7c1b129674213845a48ec46008c (diff)
downloadffmpeg-99ff31dc750e8ac562b529c3ec374cfbb3e66157.tar.gz
move aac and ac3 parsers in their own files
Originally committed as revision 8941 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/ac3_parser.h')
-rw-r--r--libavcodec/ac3_parser.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/libavcodec/ac3_parser.h b/libavcodec/ac3_parser.h
new file mode 100644
index 0000000000..fb35b975be
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+++ b/libavcodec/ac3_parser.h
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+/*
+ * AC3 parser prototypes
+ * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Michael Niedermayer.
+ *
+ * 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 AC3_PARSER_H
+#define AC3_PARSER_H
+
+#include "ac3.h"
+
+/**
+ * Parses AC-3 frame header.
+ * Parses the header up to the lfeon element, which is the first 52 or 54 bits
+ * depending on the audio coding mode.
+ * @param buf[in] Array containing the first 7 bytes of the frame.
+ * @param hdr[out] Pointer to struct where header info is written.
+ * @return Returns 0 on success, -1 if there is a sync word mismatch,
+ * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
+ * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
+ */
+int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr);
+
+#endif /* AC3_PARSER_H */