Separate the raw FLAC demuxer from raw.c and put in a new file,

flacdec.c.

Originally committed as revision 17660 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 72 insertions, 0 deletions

diff --git a/libavformat/flacdec.c b/libavformat/flacdec.c
new file mode 100644
index 0000000000..94d916a728
--- /dev/null
+++ b/libavformat/flacdec.c
@@ -0,0 +1,72 @@
+/*
+ * Raw FLAC demuxer
+ * Copyright (c) 2001 Fabrice Bellard
+ *
+ * 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 "avformat.h"
+#include "raw.h"
+#include "id3v2.h"
+
+static int flac_read_header(AVFormatContext *s,
+                             AVFormatParameters *ap)
+{
+    uint8_t buf[ID3v2_HEADER_SIZE];
+    int ret;
+    AVStream *st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR(ENOMEM);
+    st->codec->codec_type = CODEC_TYPE_AUDIO;
+    st->codec->codec_id = CODEC_ID_FLAC;
+    st->need_parsing = AVSTREAM_PARSE_FULL;
+    /* the parameters will be extracted from the compressed bitstream */
+
+        /* skip ID3v2 header if found */
+        ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE);
+        if (ret == ID3v2_HEADER_SIZE && ff_id3v2_match(buf)) {
+            int len = ff_id3v2_tag_len(buf);
+            url_fseek(s->pb, len - ID3v2_HEADER_SIZE, SEEK_CUR);
+        } else {
+            url_fseek(s->pb, 0, SEEK_SET);
+        }
+    return 0;
+}
+
+static int flac_probe(AVProbeData *p)
+{
+    uint8_t *bufptr = p->buf;
+    uint8_t *end    = p->buf + p->buf_size;
+
+    if(ff_id3v2_match(bufptr))
+        bufptr += ff_id3v2_tag_len(bufptr);
+
+    if(bufptr > end-4 || memcmp(bufptr, "fLaC", 4)) return 0;
+    else                                            return AVPROBE_SCORE_MAX/2;
+}
+
+AVInputFormat flac_demuxer = {
+    "flac",
+    NULL_IF_CONFIG_SMALL("raw FLAC"),
+    0,
+    flac_probe,
+    flac_read_header,
+    ff_raw_read_partial_packet,
+    .flags= AVFMT_GENERIC_INDEX,
+    .extensions = "flac",
+    .value = CODEC_ID_FLAC,
+};