split some common code from the mkv demuxer that will be useful to the muxer

patch by David Conrad  umovimus _at_ gmail.com

Originally committed as revision 9215 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/Makefile

@@ -71,7 +71,7 @@ OBJS-$(CONFIG_INGENIENT_DEMUXER)         += raw.o
 OBJS-$(CONFIG_IPMOVIE_DEMUXER)           += ipmovie.o
 OBJS-$(CONFIG_M4V_DEMUXER)               += raw.o
 OBJS-$(CONFIG_M4V_MUXER)                 += raw.o
-OBJS-$(CONFIG_MATROSKA_DEMUXER)          += matroska.o riff.o
+OBJS-$(CONFIG_MATROSKA_DEMUXER)          += matroskadec.o matroska.o riff.o
 OBJS-$(CONFIG_MJPEG_DEMUXER)             += raw.o
 OBJS-$(CONFIG_MJPEG_MUXER)               += raw.o
 OBJS-$(CONFIG_MM_DEMUXER)                += mm.o

libavformat/matroska.h

@@ -0,0 +1,196 @@
+/*
+ * Matroska constants
+ * Copyright (c) 2003-2004 The ffmpeg Project
+ *
+ * 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
+ */
+
+#ifndef MATROSKA_H
+#define MATROSKA_H
+
+#include "avcodec.h"
+
+/* EBML version supported */
+#define EBML_VERSION 1
+
+/* top-level master-IDs */
+#define EBML_ID_HEADER             0x1A45DFA3
+
+/* IDs in the HEADER master */
+#define EBML_ID_EBMLVERSION        0x4286
+#define EBML_ID_EBMLREADVERSION    0x42F7
+#define EBML_ID_EBMLMAXIDLENGTH    0x42F2
+#define EBML_ID_EBMLMAXSIZELENGTH  0x42F3
+#define EBML_ID_DOCTYPE            0x4282
+#define EBML_ID_DOCTYPEVERSION     0x4287
+#define EBML_ID_DOCTYPEREADVERSION 0x4285
+
+/* general EBML types */
+#define EBML_ID_VOID               0xEC
+
+/*
+ * Matroska element IDs. max. 32-bit.
+ */
+
+/* toplevel segment */
+#define MATROSKA_ID_SEGMENT    0x18538067
+
+/* matroska top-level master IDs */
+#define MATROSKA_ID_INFO       0x1549A966
+#define MATROSKA_ID_TRACKS     0x1654AE6B
+#define MATROSKA_ID_CUES       0x1C53BB6B
+#define MATROSKA_ID_TAGS       0x1254C367
+#define MATROSKA_ID_SEEKHEAD   0x114D9B74
+#define MATROSKA_ID_CLUSTER    0x1F43B675
+
+/* IDs in the info master */
+#define MATROSKA_ID_TIMECODESCALE 0x2AD7B1
+#define MATROSKA_ID_DURATION   0x4489
+#define MATROSKA_ID_TITLE      0x7BA9
+#define MATROSKA_ID_WRITINGAPP 0x5741
+#define MATROSKA_ID_MUXINGAPP  0x4D80
+#define MATROSKA_ID_DATEUTC    0x4461
+
+/* ID in the tracks master */
+#define MATROSKA_ID_TRACKENTRY 0xAE
+
+/* IDs in the trackentry master */
+#define MATROSKA_ID_TRACKNUMBER 0xD7
+#define MATROSKA_ID_TRACKUID   0x73C5
+#define MATROSKA_ID_TRACKTYPE  0x83
+#define MATROSKA_ID_TRACKAUDIO 0xE1
+#define MATROSKA_ID_TRACKVIDEO 0xE0
+#define MATROSKA_ID_CODECID    0x86
+#define MATROSKA_ID_CODECPRIVATE 0x63A2
+#define MATROSKA_ID_CODECNAME  0x258688
+#define MATROSKA_ID_CODECINFOURL 0x3B4040
+#define MATROSKA_ID_CODECDOWNLOADURL 0x26B240
+#define MATROSKA_ID_TRACKNAME  0x536E
+#define MATROSKA_ID_TRACKLANGUAGE 0x22B59C
+#define MATROSKA_ID_TRACKFLAGENABLED 0xB9
+#define MATROSKA_ID_TRACKFLAGDEFAULT 0x88
+#define MATROSKA_ID_TRACKFLAGLACING 0x9C
+#define MATROSKA_ID_TRACKMINCACHE 0x6DE7
+#define MATROSKA_ID_TRACKMAXCACHE 0x6DF8
+#define MATROSKA_ID_TRACKDEFAULTDURATION 0x23E383
+
+/* IDs in the trackvideo master */
+#define MATROSKA_ID_VIDEOFRAMERATE 0x2383E3
+#define MATROSKA_ID_VIDEODISPLAYWIDTH 0x54B0
+#define MATROSKA_ID_VIDEODISPLAYHEIGHT 0x54BA
+#define MATROSKA_ID_VIDEOPIXELWIDTH 0xB0
+#define MATROSKA_ID_VIDEOPIXELHEIGHT 0xBA
+#define MATROSKA_ID_VIDEOFLAGINTERLACED 0x9A
+#define MATROSKA_ID_VIDEOSTEREOMODE 0x53B9
+#define MATROSKA_ID_VIDEOASPECTRATIO 0x54B3
+#define MATROSKA_ID_VIDEOCOLOURSPACE 0x2EB524
+
+/* IDs in the trackaudio master */
+#define MATROSKA_ID_AUDIOSAMPLINGFREQ 0xB5
+#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ 0x78B5
+
+#define MATROSKA_ID_AUDIOBITDEPTH 0x6264
+#define MATROSKA_ID_AUDIOCHANNELS 0x9F
+
+/* ID in the cues master */
+#define MATROSKA_ID_POINTENTRY 0xBB
+
+/* IDs in the pointentry master */
+#define MATROSKA_ID_CUETIME    0xB3
+#define MATROSKA_ID_CUETRACKPOSITION 0xB7
+
+/* IDs in the cuetrackposition master */
+#define MATROSKA_ID_CUETRACK   0xF7
+#define MATROSKA_ID_CUECLUSTERPOSITION 0xF1
+
+/* IDs in the tags master */
+/* TODO */
+
+/* IDs in the seekhead master */
+#define MATROSKA_ID_SEEKENTRY  0x4DBB
+
+/* IDs in the seekpoint master */
+#define MATROSKA_ID_SEEKID     0x53AB
+#define MATROSKA_ID_SEEKPOSITION 0x53AC
+
+/* IDs in the cluster master */
+#define MATROSKA_ID_CLUSTERTIMECODE 0xE7
+#define MATROSKA_ID_BLOCKGROUP 0xA0
+#define MATROSKA_ID_SIMPLEBLOCK 0xA3
+
+/* IDs in the blockgroup master */
+#define MATROSKA_ID_BLOCK      0xA1
+#define MATROSKA_ID_BLOCKDURATION 0x9B
+#define MATROSKA_ID_BLOCKREFERENCE 0xFB
+
+typedef enum {
+  MATROSKA_TRACK_TYPE_VIDEO    = 0x1,
+  MATROSKA_TRACK_TYPE_AUDIO    = 0x2,
+  MATROSKA_TRACK_TYPE_COMPLEX  = 0x3,
+  MATROSKA_TRACK_TYPE_LOGO     = 0x10,
+  MATROSKA_TRACK_TYPE_SUBTITLE = 0x11,
+  MATROSKA_TRACK_TYPE_CONTROL  = 0x20,
+} MatroskaTrackType;
+
+typedef enum {
+  MATROSKA_EYE_MODE_MONO  = 0x0,
+  MATROSKA_EYE_MODE_RIGHT = 0x1,
+  MATROSKA_EYE_MODE_LEFT  = 0x2,
+  MATROSKA_EYE_MODE_BOTH  = 0x3,
+} MatroskaEyeMode;
+
+typedef enum {
+  MATROSKA_ASPECT_RATIO_MODE_FREE  = 0x0,
+  MATROSKA_ASPECT_RATIO_MODE_KEEP  = 0x1,
+  MATROSKA_ASPECT_RATIO_MODE_FIXED = 0x2,
+} MatroskaAspectRatioMode;
+
+/*
+ * These aren't in any way "matroska-form" things,
+ * it's just something I use in the muxer/demuxer.
+ */
+
+typedef enum {
+  MATROSKA_TRACK_ENABLED = (1<<0),
+  MATROSKA_TRACK_DEFAULT = (1<<1),
+  MATROSKA_TRACK_LACING  = (1<<2),
+  MATROSKA_TRACK_REAL_V  = (1<<4),
+  MATROSKA_TRACK_SHIFT   = (1<<16)
+} MatroskaTrackFlags;
+
+typedef enum {
+  MATROSKA_VIDEOTRACK_INTERLACED = (MATROSKA_TRACK_SHIFT<<0)
+} MatroskaVideoTrackFlags;
+
+/*
+ * Matroska Codec IDs. Strings.
+ */
+
+typedef struct CodecTags{
+    const char *str;
+    enum CodecID id;
+}CodecTags;
+
+#define MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC   "V_MS/VFW/FOURCC"
+#define MATROSKA_CODEC_ID_AUDIO_ACM          "A_MS/ACM"
+
+/* max. depth in the EBML tree structure */
+#define EBML_MAX_DEPTH 16
+
+extern CodecTags ff_mkv_codec_tags[];
+
+#endif /* MATROSKA_H */