diff ffmpeg/libavformat/iv8.c @ 11:f445c3017523

new files

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavformat/iv8.c	Sun Apr 21 11:16:23 2013 +0200
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2009 Michael Niedermayer
+ *
+ * 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"
+
+
+static int probe(AVProbeData *p)
+{
+    // the single file I have starts with that, I do not know if others do, too
+    if(   p->buf[0] == 1
+       && p->buf[1] == 1
+       && p->buf[2] == 3
+       && p->buf[3] == 0xB8
+       && p->buf[4] == 0x80
+       && p->buf[5] == 0x60
+      )
+        return AVPROBE_SCORE_MAX-2;
+
+    return 0;
+}
+
+static int read_header(AVFormatContext *s)
+{
+    AVStream *st;
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codec->codec_id = AV_CODEC_ID_MPEG4;
+    st->need_parsing = AVSTREAM_PARSE_FULL;
+    avpriv_set_pts_info(st, 64, 1, 90000);
+
+    return 0;
+
+}
+
+static int read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int ret, size, pts, type, flags;
+    int first_pkt      = 0;
+    int frame_complete = 0;
+
+    while (!frame_complete) {
+
+        type  = avio_rb16(s->pb); // 257 or 258
+        size  = avio_rb16(s->pb);
+        flags = avio_rb16(s->pb); //some flags, 0x80 indicates end of frame
+                avio_rb16(s->pb); //packet number
+        pts   = avio_rb32(s->pb);
+                avio_rb32(s->pb); //6A 13 E3 88
+
+        frame_complete = flags & 0x80;
+
+        size -= 12;
+        if (size < 1)
+            return -1;
+
+        if (type == 258) {
+            avio_skip(s->pb, size);
+            frame_complete = 0;
+            continue;
+        }
+
+        if (!first_pkt) {
+            ret = av_get_packet(s->pb, pkt, size);
+            if (ret < 0)
+                return ret;
+            first_pkt = 1;
+            pkt->pts  = pts;
+            pkt->pos -= 16;
+        } else {
+            ret = av_append_packet(s->pb, pkt, size);
+            if (ret < 0) {
+                av_log(s, AV_LOG_ERROR, "failed to grow packet\n");
+                av_free_packet(pkt);
+                return ret;
+            }
+        }
+        if (ret < size) {
+            av_log(s, AV_LOG_ERROR, "Truncated packet! Read %d of %d bytes\n",
+                   ret, size);
+            pkt->flags |= AV_PKT_FLAG_CORRUPT;
+            break;
+        }
+    }
+    pkt->stream_index = 0;
+
+    return 0;
+}
+
+AVInputFormat ff_iv8_demuxer = {
+    .name           = "iv8",
+    .long_name      = NULL_IF_CONFIG_SMALL("IndigoVision 8000 video"),
+    .read_probe     = probe,
+    .read_header    = read_header,
+    .read_packet    = read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+};