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-rw-r--r--media/libmkv/WebMElement.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/media/libmkv/WebMElement.c b/media/libmkv/WebMElement.c
new file mode 100644
index 000000000..4e2a3667f
--- /dev/null
+++ b/media/libmkv/WebMElement.c
@@ -0,0 +1,229 @@
+// 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 "EbmlIDs.h"
+#include "WebMElement.h"
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <time.h>
+
+#define kVorbisPrivateMaxSize 4000
+#define UInt64 uint64_t
+
+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) {
+ unsigned long blockLength = 4 + dataLength;
+ unsigned char flags = 0x00 | (isKeyframe ? 0x80 : 0x00) | (lacingFlag << 1) | discardable;
+ Ebml_WriteID(glob, SimpleBlock);
+ 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);
+ 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 t ^ r;
+}
+
+void writeVideoTrack(EbmlGlobal *glob, unsigned int trackNumber, int flagLacing,
+ const char *codecId, unsigned int pixelWidth, unsigned int pixelHeight,
+ unsigned int displayWidth, unsigned int displayHeight,
+ double frameRate) {
+ EbmlLoc start;
+ UInt64 trackID;
+ Ebml_StartSubElement(glob, &start, TrackEntry);
+ Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
+ 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);
+ if (pixelWidth != displayWidth) {
+ Ebml_SerializeUnsigned(glob, DisplayWidth, displayWidth);
+ }
+ if (pixelHeight != displayHeight) {
+ Ebml_SerializeUnsigned(glob, DisplayHeight, displayHeight);
+ }
+ 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,
+ const char *codecId, double samplingFrequency, unsigned int channels,
+ uint64_t codecDelay, uint64_t seekPreRoll,
+ unsigned char *private, unsigned long privateSize) {
+ EbmlLoc start;
+ UInt64 trackID;
+ Ebml_StartSubElement(glob, &start, TrackEntry);
+ Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
+ trackID = generateTrackID(trackNumber);
+ Ebml_SerializeUnsigned(glob, TrackUID, trackID);
+ Ebml_SerializeUnsigned(glob, TrackType, 2); // audio is always 2
+ Ebml_SerializeUnsigned(glob, CodecDelay, codecDelay);
+ Ebml_SerializeUnsigned(glob, SeekPreRoll, seekPreRoll);
+ // 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, "OPUS"); // 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);
+}
+*/