libvpx: Pull from upstream

source/libvpx/third_party/libmkv/WebMElement.c

+// Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree. An additional intellectual property rights grant can be found
+// in the file PATENTS.  All contributing project authors may
+// be found in the AUTHORS file in the root of the source tree.
+
+
+#include "EbmlBufferWriter.h"
+#include "EbmlIDs.h"
+#include "WebMElement.h"
+#include <stdio.h>
+
+#define kVorbisPrivateMaxSize  4000
+
+void writeHeader(EbmlGlobal *glob) {
+  EbmlLoc start;
+  Ebml_StartSubElement(glob, &start, EBML);
+  Ebml_SerializeUnsigned(glob, EBMLVersion, 1);
+  Ebml_SerializeUnsigned(glob, EBMLReadVersion, 1); // EBML Read Version
+  Ebml_SerializeUnsigned(glob, EBMLMaxIDLength, 4); // EBML Max ID Length
+  Ebml_SerializeUnsigned(glob, EBMLMaxSizeLength, 8); // EBML Max Size Length
+  Ebml_SerializeString(glob, DocType, "webm"); // Doc Type
+  Ebml_SerializeUnsigned(glob, DocTypeVersion, 2); // Doc Type Version
+  Ebml_SerializeUnsigned(glob, DocTypeReadVersion, 2); // Doc Type Read Version
+  Ebml_EndSubElement(glob, &start);
+}
+
+void writeSimpleBlock(EbmlGlobal *glob, unsigned char trackNumber, short timeCode,
+                      int isKeyframe, unsigned char lacingFlag, int discardable,
+                      unsigned char *data, unsigned long dataLength) {
+  Ebml_WriteID(glob, SimpleBlock);
+  unsigned long blockLength = 4 + dataLength;
+  blockLength |= 0x10000000; // TODO check length < 0x0FFFFFFFF
+  Ebml_Serialize(glob, &blockLength, sizeof(blockLength), 4);
+  trackNumber |= 0x80;  // TODO check track nubmer < 128
+  Ebml_Write(glob, &trackNumber, 1);
+  // Ebml_WriteSigned16(glob, timeCode,2); //this is 3 bytes
+  Ebml_Serialize(glob, &timeCode, sizeof(timeCode), 2);
+  unsigned char flags = 0x00 | (isKeyframe ? 0x80 : 0x00) | (lacingFlag << 1) | discardable;
+  Ebml_Write(glob, &flags, 1);
+  Ebml_Write(glob, data, dataLength);
+}
+
+static UInt64 generateTrackID(unsigned int trackNumber) {
+  UInt64 t = time(NULL) * trackNumber;
+  UInt64 r = rand();
+  r = r << 32;
+  r +=  rand();
+  UInt64 rval = t ^ r;
+  return rval;
+}
+
+void writeVideoTrack(EbmlGlobal *glob, unsigned int trackNumber, int flagLacing,
+                     char *codecId, unsigned int pixelWidth, unsigned int pixelHeight,
+                     double frameRate) {
+  EbmlLoc start;
+  Ebml_StartSubElement(glob, &start, TrackEntry);
+  Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
+  UInt64 trackID = generateTrackID(trackNumber);
+  Ebml_SerializeUnsigned(glob, TrackUID, trackID);
+  Ebml_SerializeString(glob, CodecName, "VP8");  // TODO shouldn't be fixed
+
+  Ebml_SerializeUnsigned(glob, TrackType, 1); // video is always 1
+  Ebml_SerializeString(glob, CodecID, codecId);
+  {
+    EbmlLoc videoStart;
+    Ebml_StartSubElement(glob, &videoStart, Video);
+    Ebml_SerializeUnsigned(glob, PixelWidth, pixelWidth);
+    Ebml_SerializeUnsigned(glob, PixelHeight, pixelHeight);
+    Ebml_SerializeFloat(glob, FrameRate, frameRate);
+    Ebml_EndSubElement(glob, &videoStart); // Video
+  }
+  Ebml_EndSubElement(glob, &start); // Track Entry
+}
+void writeAudioTrack(EbmlGlobal *glob, unsigned int trackNumber, int flagLacing,
+                     char *codecId, double samplingFrequency, unsigned int channels,
+                     unsigned char *private, unsigned long privateSize) {
+  EbmlLoc start;
+  Ebml_StartSubElement(glob, &start, TrackEntry);
+  Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
+  UInt64 trackID = generateTrackID(trackNumber);
+  Ebml_SerializeUnsigned(glob, TrackUID, trackID);
+  Ebml_SerializeUnsigned(glob, TrackType, 2); // audio is always 2
+  // I am using defaults for thesed required fields
+  /*  Ebml_SerializeUnsigned(glob, FlagEnabled, 1);
+      Ebml_SerializeUnsigned(glob, FlagDefault, 1);
+      Ebml_SerializeUnsigned(glob, FlagForced, 1);
+      Ebml_SerializeUnsigned(glob, FlagLacing, flagLacing);*/
+  Ebml_SerializeString(glob, CodecID, codecId);
+  Ebml_SerializeData(glob, CodecPrivate, private, privateSize);
+
+  Ebml_SerializeString(glob, CodecName, "VORBIS");  // fixed for now
+  {
+    EbmlLoc AudioStart;
+    Ebml_StartSubElement(glob, &AudioStart, Audio);
+    Ebml_SerializeFloat(glob, SamplingFrequency, samplingFrequency);
+    Ebml_SerializeUnsigned(glob, Channels, channels);
+    Ebml_EndSubElement(glob, &AudioStart);
+  }
+  Ebml_EndSubElement(glob, &start);
+}
+void writeSegmentInformation(EbmlGlobal *ebml, EbmlLoc *startInfo, unsigned long timeCodeScale, double duration) {
+  Ebml_StartSubElement(ebml, startInfo, Info);
+  Ebml_SerializeUnsigned(ebml, TimecodeScale, timeCodeScale);
+  Ebml_SerializeFloat(ebml, Segment_Duration, duration * 1000.0); // Currently fixed to using milliseconds
+  Ebml_SerializeString(ebml, 0x4D80, "QTmuxingAppLibWebM-0.0.1");
+  Ebml_SerializeString(ebml, 0x5741, "QTwritingAppLibWebM-0.0.1");
+  Ebml_EndSubElement(ebml, startInfo);
+}
+
+/*
+void Mkv_InitializeSegment(Ebml& ebml_out, EbmlLoc& ebmlLoc)
+{
+    Ebml_StartSubElement(ebml_out, ebmlLoc, 0x18538067);
+}
+
+void Mkv_InitializeSeek(Ebml& ebml_out, EbmlLoc& ebmlLoc)
+{
+    Ebml_StartSubElement(ebml_out, ebmlLoc, 0x114d9b74);
+}
+void Mkv_WriteSeekInformation(Ebml& ebml_out, SeekStruct& seekInformation)
+{
+    EbmlLoc ebmlLoc;
+    Ebml_StartSubElement(ebml_out, ebmlLoc, 0x4dbb);
+    Ebml_SerializeString(ebml_out, 0x53ab, seekInformation.SeekID);
+    Ebml_SerializeUnsigned(ebml_out, 0x53ac, seekInformation.SeekPosition);
+    Ebml_EndSubElement(ebml_out, ebmlLoc);
+}
+
+void Mkv_WriteSegmentInformation(Ebml& ebml_out, SegmentInformationStruct& segmentInformation)
+{
+    Ebml_SerializeUnsigned(ebml_out, 0x73a4, segmentInformation.segmentUID);
+    if (segmentInformation.filename != 0)
+        Ebml_SerializeString(ebml_out, 0x7384, segmentInformation.filename);
+    Ebml_SerializeUnsigned(ebml_out, 0x2AD7B1, segmentInformation.TimecodeScale);
+    Ebml_SerializeUnsigned(ebml_out, 0x4489, segmentInformation.Duration);
+    // TODO date
+    Ebml_SerializeWString(ebml_out, 0x4D80, L"MKVMUX");
+    Ebml_SerializeWString(ebml_out, 0x5741, segmentInformation.WritingApp);
+}
+
+void Mkv_InitializeTrack(Ebml& ebml_out, EbmlLoc& ebmlLoc)
+{
+    Ebml_StartSubElement(ebml_out, ebmlLoc, 0x1654AE6B);
+}
+
+static void Mkv_WriteGenericTrackData(Ebml& ebml_out, TrackStruct& track)
+{
+    Ebml_SerializeUnsigned(ebml_out, 0xD7, track.TrackNumber);
+    Ebml_SerializeUnsigned(ebml_out, 0x73C5, track.TrackUID);
+    Ebml_SerializeUnsigned(ebml_out, 0x83, track.TrackType);
+    Ebml_SerializeUnsigned(ebml_out, 0xB9, track.FlagEnabled ? 1 :0);
+    Ebml_SerializeUnsigned(ebml_out, 0x88, track.FlagDefault ? 1 :0);
+    Ebml_SerializeUnsigned(ebml_out, 0x55AA, track.FlagForced ? 1 :0);
+    if (track.Language != 0)
+        Ebml_SerializeString(ebml_out, 0x22B59C, track.Language);
+    if (track.CodecID != 0)
+        Ebml_SerializeString(ebml_out, 0x86, track.CodecID);
+    if (track.CodecPrivate != 0)
+        Ebml_SerializeData(ebml_out, 0x63A2, track.CodecPrivate, track.CodecPrivateLength);
+    if (track.CodecName != 0)
+        Ebml_SerializeWString(ebml_out, 0x258688, track.CodecName);
+}
+
+void Mkv_WriteVideoTrack(Ebml& ebml_out, TrackStruct & track, VideoTrackStruct& video)
+{
+    EbmlLoc trackHeadLoc, videoHeadLoc;
+    Ebml_StartSubElement(ebml_out, trackHeadLoc, 0xAE);  // start Track
+    Mkv_WriteGenericTrackData(ebml_out, track);
+    Ebml_StartSubElement(ebml_out, videoHeadLoc, 0xE0);  // start Video
+    Ebml_SerializeUnsigned(ebml_out, 0x9A, video.FlagInterlaced ? 1 :0);
+    Ebml_SerializeUnsigned(ebml_out, 0xB0, video.PixelWidth);
+    Ebml_SerializeUnsigned(ebml_out, 0xBA, video.PixelHeight);
+    Ebml_SerializeUnsigned(ebml_out, 0x54B0, video.PixelDisplayWidth);
+    Ebml_SerializeUnsigned(ebml_out, 0x54BA, video.PixelDisplayHeight);
+    Ebml_SerializeUnsigned(ebml_out, 0x54B2, video.displayUnit);
+    Ebml_SerializeFloat(ebml_out, 0x2383E3, video.FrameRate);
+    Ebml_EndSubElement(ebml_out, videoHeadLoc);
+    Ebml_EndSubElement(ebml_out, trackHeadLoc);
+
+}
+
+void Mkv_WriteAudioTrack(Ebml& ebml_out, TrackStruct & track, AudioTrackStruct& video)
+{
+    EbmlLoc trackHeadLoc, audioHeadLoc;
+    Ebml_StartSubElement(ebml_out, trackHeadLoc, 0xAE);
+    Mkv_WriteGenericTrackData(ebml_out, track);
+    Ebml_StartSubElement(ebml_out, audioHeadLoc, 0xE0);  // start Audio
+    Ebml_SerializeFloat(ebml_out, 0xB5, video.SamplingFrequency);
+    Ebml_SerializeUnsigned(ebml_out, 0x9F, video.Channels);
+    Ebml_SerializeUnsigned(ebml_out, 0x6264, video.BitDepth);
+    Ebml_EndSubElement(ebml_out, audioHeadLoc); // end audio
+    Ebml_EndSubElement(ebml_out, trackHeadLoc);
+}
+
+void Mkv_WriteEbmlClusterHead(Ebml& ebml_out,  EbmlLoc& ebmlLoc, ClusterHeadStruct & clusterHead)
+{
+    Ebml_StartSubElement(ebml_out, ebmlLoc, 0x1F43B675);
+    Ebml_SerializeUnsigned(ebml_out, 0x6264, clusterHead.TimeCode);
+}
+
+void Mkv_WriteSimpleBlockHead(Ebml& ebml_out,  EbmlLoc& ebmlLoc, SimpleBlockStruct& block)
+{
+    Ebml_StartSubElement(ebml_out, ebmlLoc, 0xA3);
+    Ebml_Write1UInt(ebml_out, block.TrackNumber);
+    Ebml_WriteSigned16(ebml_out,block.TimeCode);
+    unsigned char flags = 0x00 | (block.iskey ? 0x80:0x00) | (block.lacing << 1) | block.discardable;
+    Ebml_Write1UInt(ebml_out, flags);  // TODO this may be the wrong function
+    Ebml_Serialize(ebml_out, block.data, block.dataLength);
+    Ebml_EndSubElement(ebml_out,ebmlLoc);
+}
+*/