1 files changed, 79 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/cdg.c b/ffmpeg1/libavformat/cdg.c
new file mode 100644
index 0000000..2d40d3d
--- /dev/null
+++ b/ffmpeg1/libavformat/cdg.c
@@ -0,0 +1,79 @@
+/*
+ * CD Graphics Demuxer
+ * Copyright (c) 2009 Michael Tison
+ *
+ * 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 "internal.h"
+
+#define CDG_PACKET_SIZE    24
+#define CDG_COMMAND        0x09
+#define CDG_MASK           0x3F
+
+static int read_header(AVFormatContext *s)
+{
+    AVStream *vst;
+    int ret;
+
+    vst = avformat_new_stream(s, NULL);
+    if (!vst)
+        return AVERROR(ENOMEM);
+
+    vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    vst->codec->codec_id   = AV_CODEC_ID_CDGRAPHICS;
+
+    /// 75 sectors/sec * 4 packets/sector = 300 packets/sec
+    avpriv_set_pts_info(vst, 32, 1, 300);
+
+    ret = avio_size(s->pb);
+    if (ret > 0)
+        vst->duration = (ret * vst->time_base.den) / (CDG_PACKET_SIZE * 300);
+
+    return 0;
+}
+
+static int read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int ret;
+
+    while (1) {
+        ret = av_get_packet(s->pb, pkt, CDG_PACKET_SIZE);
+        if (ret < 1 || (pkt->data[0] & CDG_MASK) == CDG_COMMAND)
+            break;
+        av_free_packet(pkt);
+    }
+
+    pkt->stream_index = 0;
+    pkt->dts=
+    pkt->pts= pkt->pos / CDG_PACKET_SIZE;
+
+    if(ret>5 && (pkt->data[0]&0x3F) == 9 && (pkt->data[1]&0x3F)==1 && !(pkt->data[2+2+1] & 0x0F)){
+        pkt->flags = AV_PKT_FLAG_KEY;
+    }
+    return ret;
+}
+
+AVInputFormat ff_cdg_demuxer = {
+    .name           = "cdg",
+    .long_name      = NULL_IF_CONFIG_SMALL("CD Graphics"),
+    .read_header    = read_header,
+    .read_packet    = read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+    .extensions     = "cdg",
+};