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authorMichael Niedermayer <michaelni@gmx.at>2013-05-29 10:06:35 +0200
committerMichael Niedermayer <michaelni@gmx.at>2013-05-29 10:07:30 +0200
commit53015bb3b340885d576af87afd20479ecb126bf4 (patch)
tree3651920967aeb6783257c323d1b1366db346b35c /libavformat/wv.c
parentad649e829d6af3409ea1bb2d45cc4e1310f3ba69 (diff)
parent794ca87d2bff2513118de8b97595b3e23070e67d (diff)
downloadffmpeg-53015bb3b340885d576af87afd20479ecb126bf4.tar.gz
Merge commit '794ca87d2bff2513118de8b97595b3e23070e67d'
* commit '794ca87d2bff2513118de8b97595b3e23070e67d': wvdec: split block header parsing into a separate file Conflicts: libavformat/Makefile libavformat/wvdec.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavformat/wv.c')
-rw-r--r--libavformat/wv.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/libavformat/wv.c b/libavformat/wv.c
new file mode 100644
index 0000000000..0f4f80761a
--- /dev/null
+++ b/libavformat/wv.c
@@ -0,0 +1,52 @@
+/*
+ * WavPack shared functions
+ *
+ * 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
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+
+#include "wv.h"
+
+int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
+{
+ memset(wv, 0, sizeof(*wv));
+
+ if (AV_RL32(data) != MKTAG('w', 'v', 'p', 'k'))
+ return AVERROR_INVALIDDATA;
+
+ wv->blocksize = AV_RL32(data + 4);
+ if (wv->blocksize < 24 || wv->blocksize > WV_BLOCK_LIMIT)
+ return AVERROR_INVALIDDATA;
+ wv->blocksize -= 24;
+
+ wv->version = AV_RL16(data + 8);
+ wv->total_samples = AV_RL32(data + 12);
+ wv->block_idx = AV_RL32(data + 16);
+ wv->samples = AV_RL32(data + 20);
+ wv->flags = AV_RL32(data + 24);
+ wv->crc = AV_RL32(data + 28);
+
+ wv->initial = !!(wv->flags & WV_FLAG_INITIAL_BLOCK);
+ wv->final = !!(wv->flags & WV_FLAG_FINAL_BLOCK);
+
+ return 0;
+}