Put ff_flac_write_header() in a separate C file to allow it to be shared without

duplicating code or adding a dependency on vorbiscomment.o.

Originally committed as revision 22652 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 49 insertions, 0 deletions

diff --git a/libavformat/flacenc_header.c b/libavformat/flacenc_header.c
new file mode 100644
index 0000000000..92a129a7d6
--- /dev/null
+++ b/libavformat/flacenc_header.c
@@ -0,0 +1,49 @@
+/*
+ * raw FLAC muxer
+ * Copyright (C) 2009 Justin Ruggles
+ *
+ * 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 "libavcodec/flac.h"
+#include "libavcodec/bytestream.h"
+#include "avformat.h"
+#include "flacenc.h"
+
+int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec,
+                         int last_block)
+{
+    uint8_t header[8] = {
+        0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22
+    };
+    uint8_t *streaminfo;
+    enum FLACExtradataFormat format;
+
+    header[4] = last_block ? 0x80 : 0x00;
+    if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo))
+        return -1;
+
+    /* write "fLaC" stream marker and first metadata block header if needed */
+    if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) {
+        put_buffer(pb, header, 8);
+    }
+
+    /* write STREAMINFO or full header */
+    put_buffer(pb, codec->extradata, codec->extradata_size);
+
+    return 0;
+}