ac3_parser: add a public function for parsing the data required by the demuxer

[ffmpeg] / libavcodec / ac3_parser.h

diff --git a/libavcodec/ac3_parser.h b/libavcodec/ac3_parser.h
index 50b70b08e55fde34cef1513fc82ec29f3ae0f8b7..f78c461041a50accadbee9b932be3acb71ff2954 100644 (file)
--- a/libavcodec/ac3_parser.h
+++ b/libavcodec/ac3_parser.h
@@ -3,39 +3,34 @@
  * Copyright (c) 2003 Fabrice Bellard
  * Copyright (c) 2003 Michael Niedermayer
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef AVCODEC_AC3_PARSER_H
 #define AVCODEC_AC3_PARSER_H
 
-#include "ac3.h"
-#include "get_bits.h"
+#include <stddef.h>
+#include <stdint.h>
 
 /**
- * Parse AC-3 frame header.
- * Parse the header up to the lfeon element, which is the first 52 or 54 bits
- * depending on the audio coding mode.
- * @param[in]  gbc BitContext containing the first 54 bits of the frame.
- * @param[out] hdr 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.
+ * Extract the bitstream ID and the frame size from AC-3 data.
  */
-int ff_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr);
+int av_ac3_parse_header(const uint8_t *buf, size_t size,
+                        uint8_t *bitstream_id, uint16_t *frame_size);
+
 
 #endif /* AVCODEC_AC3_PARSER_H */