ffmpeg-2.8.5

git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-02-05 22:08:02 +00:00
parent a08f61ddb9
commit a4b787f4b8
5429 changed files with 1356786 additions and 0 deletions
--- a/contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/m4vdec.c
+++ b/contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/m4vdec.c
@@ -0,0 +1,60 @@
+/*
+ * RAW MPEG-4 video demuxer
+ * Copyright (c) 2006  Thijs Vermeir <thijs.vermeir@barco.com>
+ *
+ * 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 "rawdec.h"
+
+#define VISUAL_OBJECT_START_CODE       0x000001b5
+#define VOP_START_CODE                 0x000001b6
+
+static int mpeg4video_probe(AVProbeData *probe_packet)
+{
+    uint32_t temp_buffer = -1;
+    int VO = 0, VOL = 0, VOP = 0, VISO = 0, res = 0;
+    int i;
+
+    for (i = 0; i < probe_packet->buf_size; i++) {
+        temp_buffer = (temp_buffer << 8) + probe_packet->buf[i];
+        if (temp_buffer & 0xfffffe00)
+            continue;
+        if (temp_buffer < 2)
+            continue;
+
+        if (temp_buffer == VOP_START_CODE)
+            VOP++;
+        else if (temp_buffer == VISUAL_OBJECT_START_CODE)
+            VISO++;
+        else if (temp_buffer >= 0x100 && temp_buffer < 0x120)
+            VO++;
+        else if (temp_buffer >= 0x120 && temp_buffer < 0x130)
+            VOL++;
+        else if (!(0x1AF < temp_buffer && temp_buffer < 0x1B7) &&
+                 !(0x1B9 < temp_buffer && temp_buffer < 0x1C4))
+            res++;
+    }
+
+    if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res == 0)
+        return VOP+VO > 4 ? AVPROBE_SCORE_EXTENSION : AVPROBE_SCORE_EXTENSION/2;
+    return 0;
+}
+
+FF_DEF_RAWVIDEO_DEMUXER2(m4v, "raw MPEG-4 video", mpeg4video_probe, "m4v",
+                         AV_CODEC_ID_MPEG4, AVFMT_GENERIC_INDEX | AVFMT_TS_DISCONT)